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