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x in (-oo:+oo)
2*x-(1/2) = x+7/4 // - x+7/4
2*x-x-(1/2)-(7/4) = 0
2*x-x-1/2-7/4 = 0
x-9/4 = 0 // + 9/4
x = 9/4
x = 9/4
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