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x in (-oo:+oo)
(5/8)*(x-8) = 12 // - 12
(5/8)*(x-8)-12 = 0
5/8*(x-8)-12 = 0
5/8*(x-8)-12 = 0
5/8*x-17 = 0
5/8*x-17 = 0
5/8*x-17 = 0 // + 17
5/8*x = 17 // : 5/8
x = 17/5/8
x = 136/5
x = 136/5
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