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x in (-oo:+oo)
5/12 = x+3/4 // - x+3/4
5/12-x-(3/4) = 0
5/12-x-3/4 = 0
-x-1/3 = 0 // + 1/3
-x = 1/3 // * -1
x = -1/3
x = -1/3
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