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x in (-oo:+oo)
(1/8)*(x+64) = 18 // - 18
(1/8)*(x+64)-18 = 0
1/8*(x+64)-18 = 0
1/8*(x+64)-18 = 0
1/8*x-10 = 0
1/8*x-10 = 0
1/8*x-10 = 0 // + 10
1/8*x = 10 // : 1/8
x = 10/1/8
x = 80
x = 80
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