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x/6+3*x = (2*x)/3+25/2 // - (2*x)/3+25/2
x/6+3*x-((2*x)/3)-(25/2) = 0
x/6+3*x+(-2/3)*x-25/2 = 0
5/2*x-25/2 = 0 // + 25/2
5/2*x = 25/2 // : 5/2
x = 25/2/5/2
x = 5
x = 5
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