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x in (-oo:+oo)
3*x-(1*(1/2)*x) = 22 // - 22
3*x-(1*(1/2)*x)-22 = 0
3*x+(-1/2)*x-22 = 0
5/2*x-22 = 0 // + 22
5/2*x = 22 // : 5/2
x = 22/5/2
x = 44/5
x = 44/5
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