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