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