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