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x in (-oo:+oo)
(1/8)*(x-4) = -4 // + 4
(1/8)*(x-4)+4 = 0
1/8*(x-4)+4 = 0
1/8*(x-4)+4 = 0
1/8*x+7/2 = 0
1/8*x+7/2 = 0
1/8*x+7/2 = 0 // - 7/2
1/8*x = -7/2 // : 1/8
x = -7/2/1/8
x = -28
x = -28
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