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(7*x-1)/2 = 3*x-2 // - 3*x-2
(7*x-1)/2-(3*x)+2 = 0
(7*x-1)/2-3*x+2 = 0
(7*x-1)/2+(-3*2*x)/2+(2^2)/2 = 0
7*x-3*2*x-1+4 = 0
x-1+4 = 0
x+3 = 0
(x+3)/2 = 0
(x+3)/2 = 0 // * 2
x+3 = 0
x+3 = 0 // - 3
x = -3
x = -3
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