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2*x+x-(7/8) = 2*x+7/2+6 // - 2*x+7/2+6
2*x+x-(2*x)-(7/8)-(7/2)-6 = 0
2*x+x-2*x-7/8-7/2-6 = 0
x-83/8 = 0 // + 83/8
x = 83/8
x = 83/8
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