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