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x in (-oo:+oo)
x/4+1/2 = 1/8 // - 1/8
x/4+1/2-(1/8) = 0
x/4+1/2-1/8 = 0
1/4*x+3/8 = 0 // - 3/8
1/4*x = -3/8 // : 1/4
x = -3/8/1/4
x = -3/2
x = -3/2
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