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