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-(2*x)-7/8 = -231/8 // + -231/8
-(2*x)-7/8-(-231/8) = 0
231/8-2*x-7/8 = 0
28-2*x = 0 // - 28
-2*x = -28 // : -2
x = -28/(-2)
x = 14
x = 14
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