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- 30 + 25x = 5x - 10
25x - 5x = - 10 + 30
20x = 20
x = 20/20
x = 1
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16 + 5x = x - 3 (4 + x)
16 + 5x = x - 12 - 3x
5x - x + 3x = - 12 - 16
7x = - 28
x = -28/7
x = - 4
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- 3 (6 - 6x) - 3 = x - 4
- 18 + 18x - 3 = x - 4
18x - x = - 4 + 3 + 18
17x = 17
x = 17/17
x = 1
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- 6x = 3 (5x + 8) - 3
- 6x = 15x + 24 - 3
- 6x - 15x = 24 - 3
- 21x = 21
x = -21/21
x = - 1