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(3*x-1)/4-3 = (-x-3)/6 // - (-x-3)/6
(3*x-1)/4-((-x-3)/6)-3 = 0
(3*x-1)/4+(-1*(-x-3))/6-3 = 0
(6*(3*x-1))/(4*6)+(-1*4*(-x-3))/(4*6)+(-3*4*6)/(4*6) = 0
6*(3*x-1)-1*4*(-x-3)-3*4*6 = 0
22*x-72+6 = 0
22*x-66 = 0
(22*x-66)/(4*6) = 0
(22*x-66)/(4*6) = 0 // * 4*6
22*x-66 = 0
22*x-66 = 0 // + 66
22*x = 66 // : 22
x = 66/22
x = 3
x = 3
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