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x in (-oo:+oo)
3*x-((-1/2)*x)-5 = 2 // - 2
3*x-((-1/2)*x)-5-2 = 0
3*x+(1/2)*x-5-2 = 0
7/2*x-7 = 0 // + 7
7/2*x = 7 // : 7/2
x = 7/7/2
x = 2
x = 2
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