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  • 1. 61. 3x + 1 = 5x + 4 1. 2. 3. 4. 62. -2x – 3 = 3 (x – 2) a a+2 1. 2. 3. 4. 63. 8 30 6 1. 64 2. 84 3. 104 4. 124 64. x 1. 9 2. 10 3. 11 4. 12 5 x 35
  • 2. 65. 12 36 1. 2. 3. 4. 4 5 6 7 66. 3x = 9 – 2y x+y=3 1. 2. 3. 4. (0, -1) (1, 2) (3, 0) (0, -3) 67. 1. 2. 3. 4. 14 12 18, 24 24, 36 30, 52 34, 42 68. x + 2y = 7 2x – y = 4 1. 2. 3. 4. 69. 7.5 x = 3, x = -3, x = 5, x = -5, 1. 2, 5.5 y=2 y = -2 y=1 y = -1 2.5
  • 3. 2. 3, 4.5 3. 4, 3.5 4. 5, 2.5 70. 1. 2. 3. 4. 71. 1. 2. 3. 4. 23 18, 24, 23, 26, 25, 22, 2 21 22 23 24 72. 12.5, 13, 11.5, 10, 9.5 1. 10.2 2. 11.3 3. 12.1 4. 13.2 73. 1. 2. 3. 4. 2, 2, 2, 3, 4, 5, 6, 7 2, 3, 4, 4, 4, 5, 5, 5, 6 2, 2, 3, 5, 6, 7, 8 3, 4, 5, 6, 6, 7, 7, 7 74. 6y + 9 < -8 + 7y 1. y< 17 2. y< 18 3. y> 17 4. y> 18 75. y a
  • 4. ( 12 24 28 64 1 1. 2. 3. 4. 76. 25 % 1. 300 2. 320 3. 340 4. 360 77. 1. 2. 3. 4. 78. 1. 2. 3. 4. 1,280 1 12 24 36 44 1 k
  • 5. 79. 2 1. 2. 3. 4. 80. 10 2 3 1. 10 2. 15 3. 20 4. 30 81. 11 + 12 + 13 + … + 20 = ? 1. 55 2. 155 3. 210 4. 310 82. 40 1. 400 2. 680 3. 780
  • 6. 4. 800 83. 10 20 8 2,200 10 % 1.22 2.23 3.24 4.25 84. 1. 2. 3. 4. 1,800 1,900 2,000 2,100 85. 12 6 1. 1 2. 2 3. 3 4. 4 86. 40 % 1. 2. 3. 4. 87. 700 600 10 % 20 % 30 % 40 % 4 14
  • 7. 1. 2. 3. 4. 14 16 18 20 88. 1 4 2 4 6 120 10 1. 1 2. 1 3. 1 4. 1 80 300 600 800 89. 500 15 2 1. 30 2. 60 3. 62 4.120 90. 1 100 0 1. 9 2. 10 3. 11 4. 12  1( 3(  ...........91) 4x + 3 = 8 ............... 92) 8 + 3d < 25 ............. 93) ............... 94) y2 = 36 9(x – 1) ≠ 12
  • 8. ............. 95) ............... 96) y2- 2 ≤ 24 ............. 97) ............... 98) 5x + 1 ≥ x - 7 -2x + 3 > 15 x - 2 = 14 ............. 99) 3 – x = -(x – 3) ............. 100) x ÷ 9 < 13

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