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x in (-oo:+oo)
8*(x+1/4) = 18 // - 18
8*(x+1/4)-18 = 0
8*(x+1/4)-18 = 0
8*x-16 = 0
8*x-16 = 0
8*x-16 = 0 // + 16
8*x = 16 // : 8
x = 16/8
x = 2
x = 2
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