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20x - 46 = 2x - 10
20x - 2x = 46 - 10
18x = 36
x = 36 ÷ 18
x = 2
-8x - 40 = - 60 - 4x
-8x + 4x = -60 + 40
- 4x = -20
x = 20 ÷ 4
x = 5
- 24x + 24 = - 12x - 60
- 24x + 12x = - 60 - 24
- 12x = - 84
x = 84 ÷ 12
x = 7
fin