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x + 2x - x = -36 + 28 - 2
2x = -10
-10
x = ---------- = - 5 ⇒ x = - 5
2
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2) 3x + 2 - 11 = 5x - 7
2 - 11 + 7 = 5x - 3x
- 2 = 2x
-2
x = ---------- = - 1 ⇒ x = -1
2
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3) 2x + [3x - ( 4 + x )] = 0
2x + [2x - 4 ] = 0
4x - 4 = 0
4x = 4
4
x = ----- = 1 ⇒ x = 1
4
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4) x - [8 - (3x - 10)] = 10
x - [-3x + 18) = 10
x + 3x - 18 = 10
x + 3x = 10 +18
4x = 28
28
x = --------- ⇒ x = 7
4
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5) [6 - ( 3x - 2)] - 1 = 4x
[-3x +8] - 1 = 4x
-3x +7 = 4x
7 = 4x + 3x
7 = 7x
7
x = --------- = 1 ⇒ x = 1
7
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6) {4 + [x - (9 + 2x)]} + 3 = 8x - 29
{4 + [ x -9 - 2x ]} + 3 = 8x - 29
{4 - x - 9 } + 3 = 8x - 29
{-x - 5} +3 = 8x - 29
-x - 2 = 8x - 29
-2 + 29 = 8x + x
27 = 9x
27
x = ------- = 3 ⇒ x = 3
9
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7) 3(2 - x ) = 21
6 - 3x = 21
- 3x = 21 - 6
- 3x = 15
15
x = ------- = -5 ⇒ x = - 5
-3
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8) 30 - 2(5 - x) = 10
30 - 10 + 2x = 10
2x = 10 - 30 +10
2x = -10
-10
x = -------- = -5 ⇒ x = - 5
2
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