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x=2
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-20 = -4x - 6x-20 = -10x20 = 10x2 = x
-20 = -4x - 6x -20 = -10x -20 / -10 = -10x / -10 2 = x x = 2
4x-15=6x-4x 4x-22.4=2x 2x=22.4 x=11.2
x = 2