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