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(9/8)*(x-1)+7 = 0
9/8*(x-1)+7 = 0
9/8*(x-1)+7 = 0
9/8*x+47/8 = 0
9/8*x+47/8 = 0
9/8*x+47/8 = 0 // - 47/8
9/8*x = -47/8 // : 9/8
x = -47/8/9/8
x = -47/9
x = -47/9
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