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(3/8)*x-(3/4) = (-1/2)*x-(7/8) // - (-1/2)*x-(7/8)
(3/8)*x-((-1/2)*x)-(3/4)+7/8 = 0
(3/8)*x+(1/2)*x-3/4+7/8 = 0
7/8*x+1/8 = 0 // - 1/8
7/8*x = -1/8 // : 7/8
x = -1/8/7/8
x = -1/7
x = -1/7
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