The document contains a system of linear equations with variables E1 through E7 and x1 through x7. There are 13 sets of 7 linear equations each, with the left side of each equation containing a coefficient for one of the E variables and one or more of the x variables, and the right side giving a constant value. The system seeks to solve for the values of the variables that satisfy all the equations simultaneously.

1. 1 E1 + 4 x1 - 7 x2 + 7 x3 + 7 x4 - 8 x5 - 4 x6 + 4 x7 = - 1
E2 + 2 x1 + 8 x2 + 2 x3 + 3 x4 - 6 x5 + 2 x6 - 2 x7 = + 82
E3 - 6 x1 + 7 x2 - 4 x3 - 9 x4 + 9 x5 + 7 x6 + 7 x7 = + 51
E4 - 6 x1 + 7 x2 + 2 x3 + 6 x4 + 3 x5 - 4 x6 + 8 x7 = + 90
E5 - 8 x1 - 2 x2 - 7 x3 + 4 x4 + 8 x5 - 4 x6 + 1 x7 = - 36
E6 + 9 x1 + 4 x2 + 3 x3 - 6 x4 + 6 x5 + 7 x6 - 3 x6 = - 72
E7 + 2 x1 - 8 x2 + 5 x3 + 3 x4 + 6 x5 - 4 x6 + 4 x6 = - 103
2 E1 + 3 x1 + 1 x2 + 5 x3 + 6 x4 + 2 x5 - 5 x6 - 3 x7 = + 14
E2 - 3 x1 + 7 x2 + 8 x3 - 9 x4 - 6 x5 - 3 x6 + 5 x7 = - 136
E3 - 5 x1 - 8 x2 - 5 x3 + 8 x4 - 2 x5 + 7 x6 - 2 x7 = + 88
E4 - 9 x1 + 4 x2 - 6 x3 + 2 x4 - 3 x5 + 7 x6 + 7 x7 = + 15
E5 + 7 x1 - 3 x2 - 3 x3 - 8 x4 - 2 x5 - 8 x6 - 9 x7 = - 18
E6 - 6 x1 - 6 x2 + 9 x3 - 8 x4 + 8 x5 - 6 x6 - 2 x6 = + 126
E7 + 5 x1 + 3 x2 + 4 x3 + 4 x4 - 2 x5 - 8 x6 - 6 x6 = - 38
3 E1 + 6 x1 - 1 x2 - 9 x3 - 2 x4 + 3 x5 - 4 x6 + 8 x7 = + 25
E2 - 2 x1 + 2 x2 + 6 x3 - 5 x4 + 6 x5 - 3 x6 - 2 x7 = + 6
E3 + 2 x1 + 5 x2 + 8 x3 + 2 x4 - 5 x5 + 8 x6 + 2 x7 = - 112
E4 + 5 x1 - 6 x2 + 2 x3 - 1 x4 + 3 x5 + 7 x6 + 2 x7 = - 128
E5 + 5 x1 + 3 x2 + 7 x3 + 5 x4 + 4 x5 - 5 x6 - 9 x7 = + 10
E6 - 2 x1 + 7 x2 + 4 x3 - 8 x4 - 7 x5 - 6 x6 - 2 x6 = + 96
E7 + 3 x1 - 8 x2 - 5 x3 + 7 x4 - 4 x5 - 6 x6 + 9 x6 = - 12
4 E1 + 9 x1 + 2 x2 + 8 x3 - 7 x4 - 7 x5 - 2 x6 - 8 x7 = - 49
E2 - 2 x1 + 7 x2 - 5 x3 + 3 x4 - 9 x5 - 3 x6 - 1 x7 = + 2
E3 - 7 x1 - 1 x2 + 6 x3 + 7 x4 + 6 x5 + 6 x6 - 8 x7 = + 135
E4 + 2 x1 + 6 x2 - 4 x3 - 6 x4 - 4 x5 - 6 x6 - 8 x7 = - 48
E5 - 2 x1 - 8 x2 + 5 x3 - 8 x4 - 2 x5 + 2 x6 + 4 x7 = - 140
E6 - 2 x1 - 5 x2 + 8 x3 + 4 x4 + 3 x5 - 3 x6 + 2 x6 = + 7
E7 + 5 x1 - 8 x2 - 2 x3 + 6 x4 + 6 x5 + 6 x6 + 8 x6 = + 46

2. 5 E1 + 7 x1 - 4 x2 + 2 x3 + 1 x4 + 8 x5 + 6 x6 - 7 x7 = - 23
E2 + 7 x1 + 1 x2 + 9 x3 + 2 x4 - 3 x5 + 4 x6 + 5 x7 = - 5
E3 + 2 x1 - 1 x2 + 4 x3 + 7 x4 + 3 x5 - 6 x6 - 5 x7 = - 50
E4 - 4 x1 + 9 x2 + 3 x3 - 9 x4 - 5 x5 + 3 x6 - 5 x7 = - 111
E5 - 5 x1 - 8 x2 + 9 x3 - 5 x4 - 7 x5 - 6 x6 + 2 x7 = + 28
E6 - 7 x1 + 4 x2 - 6 x3 - 6 x4 - 9 x5 + 3 x6 - 2 x6 = + 30
E7 + 2 x1 - 1 x2 + 3 x3 + 6 x4 - 8 x5 - 5 x6 + 7 x6 = + 47
6 E1 - 7 x1 - 6 x2 + 6 x3 - 2 x4 + 8 x5 + 5 x6 - 6 x7 = - 70
E2 + 1 x1 - 7 x2 + 1 x3 + 2 x4 + 2 x5 + 4 x6 - 4 x7 = - 65
E3 - 4 x1 - 9 x2 - 7 x3 - 7 x4 - 5 x5 + 4 x6 + 3 x7 = + 25
E4 + 4 x1 + 1 x2 + 2 x3 + 3 x4 - 7 x5 + 5 x6 + 2 x7 = + 91
E5 - 8 x1 - 6 x2 - 6 x3 - 2 x4 - 6 x5 + 7 x6 + 2 x7 = + 14
E6 - 4 x1 + 4 x2 - 6 x3 - 8 x4 + 5 x5 + 3 x6 + 4 x6 = + 88
E7 - 1 x1 - 7 x2 + 7 x3 - 3 x4 + 2 x5 - 9 x6 + 9 x6 = - 9
7 E1 - 9 x1 - 3 x2 + 7 x3 - 8 x4 - 4 x5 - 6 x6 + 1 x7 = - 110
E2 - 8 x1 + 4 x2 - 2 x3 + 7 x4 - 7 x5 - 7 x6 - 6 x7 = - 62
E3 + 6 x1 + 1 x2 + 7 x3 + 5 x4 - 7 x5 + 5 x6 - 7 x7 = + 79
E4 - 5 x1 + 3 x2 - 4 x3 + 4 x4 - 5 x5 + 5 x6 - 2 x7 = + 17
E5 - 2 x1 + 4 x2 + 6 x3 + 9 x4 - 3 x5 + 9 x6 + 6 x7 = - 74
E6 - 7 x1 - 6 x2 + 2 x3 + 1 x4 + 7 x5 + 7 x6 + 6 x6 = - 143
E7 - 5 x1 - 4 x2 + 6 x3 - 8 x4 + 7 x5 + 5 x6 + 2 x6 = - 50
8 E1 - 4 x1 + 4 x2 + 9 x3 - 6 x4 - 4 x5 - 3 x6 - 5 x7 = - 154
E2 - 4 x1 + 9 x2 + 6 x3 - 6 x4 - 2 x5 + 5 x6 + 7 x7 = - 9
E3 - 6 x1 + 4 x2 + 3 x3 + 1 x4 + 3 x5 + 2 x6 + 9 x7 = + 30
E4 - 4 x1 + 5 x2 - 5 x3 - 6 x4 + 5 x5 - 5 x6 - 4 x7 = - 53
E5 - 3 x1 + 2 x2 + 6 x3 + 3 x4 - 4 x5 - 5 x6 - 3 x7 = - 102
E6 - 6 x1 - 1 x2 + 4 x3 + 2 x4 - 7 x5 - 6 x6 - 6 x6 = - 141
E7 + 5 x1 - 8 x2 - 7 x3 - 5 x4 - 8 x5 - 7 x6 + 7 x6 = + 82

3. 9 E1 - 9 x1 + 3 x2 - 9 x3 - 2 x4 + 3 x5 - 4 x6 - 9 x7 = - 50
E2 + 2 x1 + 6 x2 + 4 x3 + 5 x4 + 4 x5 + 7 x6 - 3 x7 = + 3
E3 + 7 x1 + 7 x2 + 5 x3 - 8 x4 + 7 x5 + 2 x6 - 5 x7 = - 104
E4 + 4 x1 + 9 x2 + 2 x3 - 4 x4 - 5 x5 + 3 x6 - 6 x7 = - 29
E5 + 4 x1 - 6 x2 + 7 x3 - 9 x4 + 5 x5 - 3 x6 + 2 x7 = - 71
E6 + 4 x1 + 5 x2 - 4 x3 + 6 x4 + 7 x5 - 3 x6 + 7 x6 = + 18
E7 - 5 x1 - 7 x2 + 5 x3 + 8 x4 - 4 x5 + 6 x6 + 8 x6 = + 147
10 E1 - 1 x1 + 6 x2 + 2 x3 - 6 x4 - 6 x5 - 4 x6 - 5 x7 = + 4
E2 - 6 x1 + 3 x2 - 2 x3 + 8 x4 + 8 x5 - 9 x6 + 3 x7 = - 61
E3 - 6 x1 - 6 x2 - 4 x3 - 1 x4 - 8 x5 + 9 x6 + 6 x7 = + 39
E4 - 8 x1 + 2 x2 + 2 x3 + 4 x4 + 2 x5 - 2 x6 - 7 x7 = - 121
E5 + 3 x1 - 4 x2 - 8 x3 - 1 x4 + 2 x5 - 2 x6 + 6 x7 = + 68
E6 + 5 x1 - 5 x2 + 7 x3 + 4 x4 + 3 x5 + 8 x6 - 3 x6 = - 18
E7 - 4 x1 + 3 x2 - 5 x3 + 4 x4 + 8 x5 + 7 x6 - 7 x6 = - 215
11 E1 + 2 x1 + 3 x2 - 7 x3 - 2 x4 - 4 x5 + 5 x6 + 2 x7 = - 55
E2 - 3 x1 + 3 x2 + 5 x3 - 6 x4 + 7 x5 - 3 x6 - 3 x7 = - 27
E3 - 5 x1 - 6 x2 - 3 x3 + 7 x4 - 5 x5 + 4 x6 - 8 x7 = + 32
E4 + 6 x1 - 5 x2 - 2 x3 + 8 x4 - 7 x5 + 7 x6 + 8 x7 = + 20
E5 + 3 x1 + 9 x2 - 8 x3 - 6 x4 + 4 x5 - 3 x6 - 5 x7 = - 24
E6 - 6 x1 - 7 x2 + 4 x3 - 7 x4 - 8 x5 + 5 x6 - 6 x6 = - 69
E7 - 4 x1 + 9 x2 - 5 x3 + 6 x4 + 9 x5 + 7 x6 - 9 x6 = + 7
12 E1 - 5 x1 - 5 x2 + 5 x3 - 5 x4 + 3 x5 + 4 x6 - 5 x7 = - 11
E2 + 4 x1 + 7 x2 + 5 x3 - 7 x4 - 4 x5 + 9 x6 + 4 x7 = - 60
E3 + 5 x1 - 2 x2 + 5 x3 - 6 x4 - 2 x5 + 2 x6 - 2 x7 = - 32
E4 + 2 x1 - 4 x2 - 6 x3 - 4 x4 + 5 x5 - 7 x6 + 2 x7 = + 89
E5 + 3 x1 - 2 x2 - 8 x3 - 2 x4 - 8 x5 + 9 x6 - 3 x7 = - 12
E6 + 9 x1 + 2 x2 - 3 x3 + 9 x4 - 5 x5 + 6 x6 - 2 x6 = - 7
E7 + 7 x1 - 6 x2 - 1 x3 + 3 x4 - 4 x5 - 7 x6 - 5 x6 = - 10

4. 13 E1 + 8 x1 + 1 x2 - 5 x3 - 4 x4 + 9 x5 - 6 x6 - 8 x7 = + 111
E2 + 2 x1 - 8 x2 + 2 x3 - 5 x4 - 5 x5 + 2 x6 - 6 x7 = + 32
E3 - 5 x1 - 6 x2 - 4 x3 - 7 x4 - 4 x5 - 5 x6 + 5 x7 = - 102
E4 + 2 x1 + 8 x2 + 7 x3 + 3 x4 - 6 x5 + 7 x6 - 7 x7 = + 27
E5 + 7 x1 - 5 x2 - 5 x3 + 6 x4 + 9 x5 - 5 x6 - 4 x7 = + 126
E6 + 3 x1 - 8 x2 + 4 x3 - 4 x4 + 7 x5 - 3 x6 + 5 x6 = + 108
E7 + 2 x1 + 8 x2 - 5 x3 - 1 x4 - 8 x5 + 8 x6 + 6 x6 = - 130
14 E1 + 8 x1 - 3 x2 - 2 x3 + 5 x4 - 6 x5 + 3 x6 - 3 x7 = + 47
E2 - 3 x1 + 6 x2 - 6 x3 + 2 x4 + 8 x5 + 1 x6 - 4 x7 = + 18
E3 + 5 x1 + 7 x2 + 3 x3 - 3 x4 + 5 x5 + 8 x6 + 5 x7 = + 45
E4 - 3 x1 - 8 x2 + 8 x3 + 4 x4 - 4 x5 - 3 x6 - 4 x7 = - 112
E5 - 4 x1 + 3 x2 - 7 x3 + 5 x4 + 8 x5 - 7 x6 + 2 x7 = + 9
E6 - 1 x1 - 6 x2 + 8 x3 - 7 x4 + 7 x5 - 3 x6 - 8 x6 = - 130
E7 + 2 x1 + 1 x2 - 3 x3 - 1 x4 - 3 x5 + 5 x6 - 8 x6 = + 34
15 E1 - 5 x1 + 8 x2 + 3 x3 + 6 x4 - 2 x5 - 9 x6 - 8 x7 = + 83
E2 + 9 x1 + 4 x2 - 8 x3 + 2 x4 + 3 x5 - 7 x6 - 7 x7 = + 67
E3 + 6 x1 + 9 x2 - 1 x3 + 3 x4 + 5 x5 + 2 x6 + 6 x7 = + 6
E4 - 7 x1 + 3 x2 + 2 x3 + 1 x4 - 5 x5 + 7 x6 - 7 x7 = + 90
E5 - 6 x1 - 6 x2 - 2 x3 - 3 x4 - 4 x5 - 3 x6 - 8 x7 = + 33
E6 + 4 x1 - 6 x2 + 8 x3 - 7 x4 - 9 x5 + 6 x6 + 4 x6 = - 147
E7 + 4 x1 + 3 x2 + 4 x3 + 7 x4 - 8 x5 - 5 x6 + 8 x6 = - 30
16 E1 - 3 x1 + 5 x2 + 4 x3 + 2 x4 - 2 x5 + 8 x6 + 8 x7 = - 41
E2 - 2 x1 - 1 x2 - 8 x3 + 5 x4 + 5 x5 + 5 x6 - 4 x7 = + 41
E3 + 9 x1 + 9 x2 + 2 x3 - 6 x4 - 3 x5 + 2 x6 - 6 x7 = - 11
E4 + 6 x1 - 3 x2 + 3 x3 - 2 x4 - 1 x5 - 3 x6 - 9 x7 = + 7
E5 + 7 x1 - 8 x2 - 6 x3 - 4 x4 + 8 x5 + 1 x6 - 4 x7 = + 169
E6 - 4 x1 - 8 x2 - 6 x3 + 5 x4 - 5 x5 - 1 x6 - 9 x6 = + 2
E7 - 1 x1 + 3 x2 + 3 x3 + 5 x4 - 5 x5 - 7 x6 - 2 x6 = - 104

5. 17 E1 - 5 x1 - 2 x2 + 7 x3 + 1 x4 - 8 x5 + 8 x6 - 3 x7 = + 93
E2 - 4 x1 + 5 x2 - 8 x3 - 6 x4 + 2 x5 - 8 x6 + 2 x7 = - 85
E3 - 4 x1 - 4 x2 + 2 x3 - 3 x4 + 4 x5 - 7 x6 + 3 x7 = - 58
E4 + 7 x1 - 2 x2 + 7 x3 + 4 x4 - 3 x5 + 4 x6 + 5 x7 = + 49
E5 - 5 x1 - 5 x2 - 8 x3 - 4 x4 + 4 x5 + 5 x6 - 8 x7 = - 30
E6 - 6 x1 + 5 x2 + 2 x3 - 3 x4 - 8 x5 + 2 x6 + 4 x6 = + 17
E7 - 2 x1 + 9 x2 - 5 x3 - 7 x4 - 4 x5 - 7 x6 + 3 x6 = - 17
18 E1 + 4 x1 - 7 x2 + 3 x3 + 2 x4 - 7 x5 - 5 x6 - 4 x7 = + 1
E2 - 6 x1 - 8 x2 - 1 x3 + 4 x4 + 6 x5 + 3 x6 + 5 x7 = - 43
E3 + 6 x1 - 5 x2 - 2 x3 - 1 x4 - 2 x5 - 5 x6 - 8 x7 = - 110
E4 - 7 x1 - 7 x2 - 3 x3 - 4 x4 - 4 x5 - 8 x6 - 2 x7 = - 27
E5 + 2 x1 - 5 x2 - 4 x3 - 9 x4 + 2 x5 + 6 x6 + 4 x7 = - 111
E6 - 2 x1 + 1 x2 + 4 x3 + 3 x4 + 6 x5 - 3 x6 + 5 x6 = + 26
E7 + 2 x1 - 9 x2 + 1 x3 + 3 x4 + 6 x5 + 5 x6 + 2 x6 = - 96
19 E1 + 4 x1 + 8 x2 - 8 x3 + 7 x4 + 3 x5 - 2 x6 - 3 x7 = + 129
E2 + 5 x1 - 4 x2 - 3 x3 - 7 x4 + 5 x5 + 8 x6 + 3 x7 = + 29
E3 - 7 x1 - 4 x2 + 7 x3 - 6 x4 - 7 x5 - 4 x6 + 8 x7 = - 157
E4 + 6 x1 - 2 x2 + 7 x3 - 2 x4 + 4 x5 - 8 x6 - 4 x7 = - 91
E5 + 2 x1 + 4 x2 + 2 x3 + 2 x4 - 6 x5 + 8 x6 - 2 x7 = + 70
E6 + 5 x1 + 5 x2 - 7 x3 + 2 x4 - 5 x5 + 2 x6 - 7 x6 = + 59
E7 - 1 x1 + 5 x2 - 3 x3 + 7 x4 - 6 x5 - 8 x6 - 6 x6 = - 8
20 E1 + 8 x1 + 5 x2 - 7 x3 - 3 x4 + 6 x5 + 2 x6 + 5 x7 = + 50
E2 - 8 x1 + 6 x2 + 7 x3 - 5 x4 - 8 x5 + 3 x6 + 2 x7 = - 28
E3 + 8 x1 - 8 x2 + 4 x3 + 4 x4 - 4 x5 + 6 x6 + 5 x7 = + 64
E4 + 7 x1 - 3 x2 + 5 x3 + 1 x4 - 6 x5 - 7 x6 + 4 x7 = - 19
E5 + 7 x1 - 7 x2 - 3 x3 + 7 x4 - 7 x5 - 5 x6 - 2 x7 = - 45
E6 + 7 x1 + 9 x2 - 3 x3 - 3 x4 - 3 x5 + 2 x6 - 1 x6 = + 58
E7 - 6 x1 - 2 x2 + 4 x3 - 2 x4 - 3 x5 - 1 x6 - 4 x6 = - 9

6. 21 E1 - 7 x1 - 4 x2 + 8 x3 - 4 x4 - 3 x5 + 5 x6 + 1 x7 = + 112
E2 + 7 x1 - 2 x2 - 1 x3 - 8 x4 + 8 x5 - 2 x6 - 1 x7 = + 7
E3 - 6 x1 + 7 x2 + 8 x3 + 7 x4 - 2 x5 - 4 x6 + 9 x7 = + 32
E4 - 2 x1 - 6 x2 - 7 x3 - 5 x4 + 4 x5 - 2 x6 - 5 x7 = - 43
E5 + 2 x1 - 8 x2 + 8 x3 - 4 x4 - 8 x5 - 6 x6 - 6 x7 = + 158
E6 + 6 x1 + 3 x2 - 9 x3 - 6 x4 - 2 x5 - 2 x6 + 6 x6 = + 19
E7 - 4 x1 + 9 x2 + 2 x3 - 7 x4 + 9 x5 + 5 x6 + 6 x6 = - 38
22 E1 - 8 x1 + 4 x2 + 3 x3 + 8 x4 - 2 x5 + 6 x6 - 2 x7 = + 64
E2 + 5 x1 - 5 x2 + 3 x3 - 9 x4 + 5 x5 - 5 x6 - 7 x7 = - 79
E3 + 7 x1 - 9 x2 + 4 x3 + 8 x4 + 7 x5 - 5 x6 + 4 x7 = - 14
E4 + 6 x1 + 2 x2 - 5 x3 + 7 x4 - 3 x5 - 6 x6 + 7 x7 = - 12
E5 + 5 x1 + 9 x2 - 3 x3 - 9 x4 + 6 x5 + 3 x6 + 4 x7 = - 14
E6 + 9 x1 - 6 x2 + 3 x3 - 8 x4 - 3 x5 - 9 x6 + 9 x6 = - 123
E7 + 3 x1 - 8 x2 + 2 x3 - 4 x4 + 8 x5 + 2 x6 - 7 x6 = - 10
23 E1 + 8 x1 - 3 x2 + 2 x3 - 3 x4 - 6 x5 - 9 x6 - 5 x7 = + 1
E2 + 2 x1 - 2 x2 - 8 x3 + 3 x4 + 3 x5 - 4 x6 + 7 x7 = + 110
E3 - 7 x1 - 8 x2 + 3 x3 + 3 x4 + 7 x5 - 3 x6 - 4 x7 = + 28
E4 - 5 x1 + 9 x2 - 7 x3 - 5 x4 + 5 x5 + 6 x6 - 7 x7 = - 30
E5 + 5 x1 - 3 x2 + 3 x3 + 7 x4 + 5 x5 + 4 x6 + 6 x7 = + 64
E6 + 8 x1 - 9 x2 + 8 x3 + 8 x4 + 5 x5 + 8 x6 + 5 x6 = + 63
E7 - 5 x1 + 6 x2 + 8 x3 + 3 x4 + 5 x5 + 8 x6 - 9 x6 = - 92
24 E1 - 4 x1 - 7 x2 - 8 x3 + 1 x4 + 6 x5 + 7 x6 + 7 x7 = - 49
E2 + 8 x1 - 4 x2 - 8 x3 - 6 x4 - 6 x5 - 9 x6 + 1 x7 = + 47
E3 - 8 x1 - 7 x2 - 8 x3 - 9 x4 - 1 x5 + 8 x6 - 3 x7 = - 45
E4 + 4 x1 - 6 x2 - 8 x3 - 8 x4 - 1 x5 - 3 x6 + 7 x7 = - 45
E5 + 3 x1 - 8 x2 + 6 x3 + 2 x4 + 6 x5 + 2 x6 + 9 x7 = - 130
E6 - 8 x1 - 7 x2 - 2 x3 + 7 x4 + 4 x5 - 2 x6 + 5 x6 = - 65
E7 - 3 x1 + 6 x2 - 1 x3 + 8 x4 - 2 x5 + 8 x6 - 5 x6 = + 131

7. 25 E1 + 2 x1 - 6 x2 + 8 x3 - 3 x4 - 8 x5 - 3 x6 - 9 x7 = - 103
E2 + 4 x1 + 6 x2 - 9 x3 + 4 x4 - 2 x5 + 9 x6 + 6 x7 = + 123
E3 - 8 x1 + 2 x2 - 5 x3 + 1 x4 + 2 x5 + 5 x6 + 8 x7 = + 175
E4 - 9 x1 + 8 x2 - 7 x3 + 7 x4 - 2 x5 - 8 x6 + 1 x7 = + 19
E5 + 6 x1 - 2 x2 - 6 x3 - 3 x4 + 7 x5 - 2 x6 + 6 x7 = + 32
E6 + 4 x1 + 7 x2 + 8 x3 + 5 x4 - 5 x5 - 3 x6 + 3 x6 = - 117
E7 + 3 x1 - 7 x2 + 6 x3 - 9 x4 - 3 x5 + 4 x6 - 7 x6 = - 21
26 E1 - 6 x1 - 6 x2 - 8 x3 - 7 x4 + 4 x5 + 7 x6 - 6 x7 = + 63
E2 - 6 x1 + 8 x2 + 6 x3 - 8 x4 - 9 x5 - 2 x6 - 6 x7 = + 18
E3 + 7 x1 - 3 x2 + 2 x3 + 2 x4 - 6 x5 - 7 x6 - 9 x7 = + 77
E4 + 9 x1 - 8 x2 + 6 x3 - 4 x4 - 5 x5 - 2 x6 + 4 x7 = + 29
E5 - 2 x1 + 8 x2 - 3 x3 + 5 x4 + 2 x5 + 1 x6 + 7 x7 = - 79
E6 + 4 x1 - 8 x2 + 3 x3 + 2 x4 + 2 x5 + 2 x6 + 3 x6 = - 14
E7 + 8 x1 + 6 x2 - 9 x3 - 7 x4 - 4 x5 + 6 x6 + 1 x6 = + 38
27 E1 - 4 x1 + 3 x2 + 9 x3 - 8 x4 - 8 x5 + 9 x6 - 6 x7 = - 69
E2 - 1 x1 - 6 x2 + 9 x3 - 6 x4 + 5 x5 - 3 x6 + 4 x7 = + 33
E3 - 8 x1 + 5 x2 - 3 x3 + 4 x4 - 3 x5 - 3 x6 - 2 x7 = + 5
E4 + 5 x1 - 1 x2 - 1 x3 - 3 x4 - 6 x5 + 4 x6 + 8 x7 = + 8
E5 + 7 x1 + 2 x2 + 6 x3 + 8 x4 - 8 x5 - 4 x6 + 2 x7 = - 56
E6 + 3 x1 - 4 x2 + 9 x3 - 2 x4 + 9 x5 - 5 x6 - 4 x6 = - 29
E7 + 7 x1 - 8 x2 + 5 x3 - 4 x4 - 7 x5 + 5 x6 - 2 x6 = - 13
28 E1 + 8 x1 + 2 x2 - 5 x3 + 7 x4 - 6 x5 + 4 x6 + 6 x7 = + 147
E2 + 3 x1 + 8 x2 + 2 x3 - 3 x4 + 7 x5 - 9 x6 + 5 x7 = - 57
E3 - 1 x1 - 4 x2 - 5 x3 - 8 x4 - 7 x5 - 4 x6 + 3 x7 = - 79
E4 - 7 x1 - 8 x2 - 3 x3 + 5 x4 + 9 x5 - 4 x6 + 4 x7 = - 86
E5 + 5 x1 - 2 x2 - 4 x3 - 4 x4 + 5 x5 - 7 x6 - 4 x7 = - 170
E6 + 5 x1 + 8 x2 - 5 x3 - 6 x4 + 4 x5 + 4 x6 + 3 x6 = + 2
E7 + 4 x1 + 6 x2 + 8 x3 - 7 x4 - 2 x5 - 6 x6 - 2 x6 = - 43

8. 29 E1 - 1 x1 + 3 x2 + 8 x3 + 8 x4 + 2 x5 - 4 x6 - 6 x7 = + 108
E2 - 5 x1 + 8 x2 - 8 x3 + 8 x4 - 2 x5 - 5 x6 - 3 x7 = + 76
E3 - 5 x1 - 3 x2 + 5 x3 - 2 x4 - 1 x5 + 6 x6 - 7 x7 = + 2
E4 + 4 x1 - 8 x2 - 4 x3 + 9 x4 - 3 x5 + 2 x6 + 1 x7 = - 105
E5 + 6 x1 + 2 x2 + 2 x3 + 5 x4 + 4 x5 - 5 x6 - 2 x7 = + 55
E6 + 4 x1 - 3 x2 + 4 x3 - 8 x4 + 7 x5 + 3 x6 + 9 x6 = - 9
E7 - 8 x1 - 4 x2 + 7 x3 - 8 x4 - 9 x5 + 9 x6 + 1 x6 = - 93
30 E1 - 6 x1 - 6 x2 + 7 x3 + 2 x4 + 1 x5 + 8 x6 - 5 x7 = - 28
E2 - 8 x1 + 6 x2 + 4 x3 - 2 x4 - 2 x5 - 3 x6 + 9 x7 = + 6
E3 - 7 x1 + 7 x2 - 9 x3 + 3 x4 + 6 x5 - 1 x6 + 9 x7 = + 164
E4 + 6 x1 - 3 x2 + 5 x3 - 4 x4 - 2 x5 + 6 x6 + 3 x7 = - 48
E5 + 8 x1 - 4 x2 - 4 x3 - 9 x4 - 2 x5 + 5 x6 - 5 x7 = - 56
E6 - 6 x1 - 6 x2 + 5 x3 + 6 x4 - 2 x5 + 5 x6 + 1 x6 = - 17
E7 - 1 x1 - 6 x2 + 2 x3 + 2 x4 - 7 x5 + 6 x6 + 4 x6 = - 51
31 E1 - 4 x1 - 5 x2 + 8 x3 + 9 x4 - 2 x5 - 1 x6 + 1 x7 = - 49
E2 - 3 x1 - 4 x2 + 1 x3 + 4 x4 + 5 x5 + 6 x6 + 6 x7 = - 136
E3 + 2 x1 + 8 x2 - 5 x3 + 4 x4 + 2 x5 - 8 x6 - 2 x7 = + 30
E4 - 7 x1 - 4 x2 - 8 x3 + 7 x4 + 1 x5 - 8 x6 - 3 x7 = + 74
E5 - 4 x1 - 8 x2 - 1 x3 + 6 x4 + 9 x5 - 3 x6 - 2 x7 = - 69
E6 - 4 x1 - 4 x2 - 5 x3 + 7 x4 - 6 x5 - 8 x6 - 4 x6 = + 106
E7 + 6 x1 + 9 x2 - 2 x3 - 4 x4 + 8 x5 - 5 x6 + 3 x6 = - 41
32 E1 - 6 x1 + 7 x2 - 6 x3 + 9 x4 + 3 x5 - 5 x6 - 7 x7 = + 28
E2 + 8 x1 - 3 x2 + 7 x3 + 7 x4 - 8 x5 + 2 x6 - 2 x7 = - 116
E3 - 3 x1 - 4 x2 + 1 x3 - 3 x4 - 3 x5 - 7 x6 - 9 x7 = - 12
E4 - 8 x1 + 3 x2 - 5 x3 + 8 x4 + 7 x5 - 8 x6 + 7 x7 = + 65
E5 + 6 x1 - 4 x2 - 6 x3 + 1 x4 + 3 x5 - 2 x6 + 6 x7 = + 44
E6 - 2 x1 - 2 x2 - 3 x3 + 4 x4 - 8 x5 + 5 x6 + 1 x6 = - 70
E7 - 8 x1 - 1 x2 - 2 x3 + 6 x4 + 3 x5 - 5 x6 - 3 x6 = - 22