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3*x-((1/2)*x)+(2/5)*x+6/10+33/5 = 0
3*x+(-1/2)*x+(2/5)*x+6/10+33/5 = 0
29/10*x+36/5 = 0 // - 36/5
29/10*x = -36/5 // : 29/10
x = -36/5/29/10
x = -72/29
x = -72/29
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