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