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x in (-oo:+oo)
x/2-(3/4) = 1/2 // - 1/2
x/2-(3/4)-(1/2) = 0
x/2-3/4-1/2 = 0
1/2*x-5/4 = 0 // + 5/4
1/2*x = 5/4 // : 1/2
x = 5/4/1/2
x = 5/2
x = 5/2
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