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(x-1)/2+3*(x+1) = (5*x)/3 // - (5*x)/3
(x-1)/2+3*(x+1)-((5*x)/3) = 0
(x-1)/2+3*(x+1)+(-5/3)*x = 0
(x-1)/2+3*(x+1)+(-5*x)/3 = 0
(3*(x-1))/(2*3)+(2*3^2*(x+1))/(2*3)+(-5*2*x)/(2*3) = 0
3*(x-1)+2*3^2*(x+1)-5*2*x = 0
21*x-10*x+15 = 0
11*x+15 = 0
(11*x+15)/(2*3) = 0
(11*x+15)/(2*3) = 0 // * 2*3
11*x+15 = 0
11*x+15 = 0 // - 15
11*x = -15 // : 11
x = -15/11
x = -15/11
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