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(7*x+4)/6 = x+3 // - x+3
(7*x+4)/6-x-3 = 0
(7*x+4)/6+(6*(-x))/6+(-3*6)/6 = 0
7*x+6*(-x)-3*6+4 = 0
x-18+4 = 0
x-14 = 0
(x-14)/6 = 0
(x-14)/6 = 0 // * 6
x-14 = 0
x-14 = 0 // + 14
x = 14
x = 14
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