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x in (-oo:+oo)
2*x-7/8 = -167/8 // + -167/8
2*x-7/8-(-167/8) = 0
2*x-7/8+167/8 = 0
2*x+20 = 0 // - 20
2*x = -20 // : 2
x = -20/2
x = -10
x = -10
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