1. 2
start

2. :
1.
x
2x + 3
= 11
5
6
7
1

3. :
2. “
24”
a
3
(x + 1) + (x + 2) + (x + 3)
= 24
(x - 1) + (x - 2) + (x - 3)
= 24
x + (x - 1) + (x - 2) = 24
x + (x + 1) + (x + 2) =
24
2

4. :
3.
5
3
8
3x - 5 = 8
5 - 3x = 8
8 - 5 = 3x
5 - 8 = 3x
3

5. :
4. “
120
”
100
100 = 120 - y
y + 100 = 120
y - 100 = 120
y = 10
4

6. :
5.
5.
36
40
40
x
36
x
40 - x = 36
x + 36 = 40
40 - 36 = x
5

7. :
6. 6
30
15
6x + 30 = 15
6x - 30 = 15
6x + 15 = 30
30 - 6x = 15
6

8. :
7.
2
15
5
5
7.5
10
20
7

9. :
8.
50
32
37
13
18
42
68
8

10. :
9.
57
17
19
21
23
9

11. :
10.
50
50
750
200
250
300
350
10