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(x-3)/4+(x-1)/3 = X-4 // - X-4
(x-3)/4+(x-1)/3-X+4 = 0
(3*(x-3))/(3*4)+(4*(x-1))/(3*4)+(3*4*(-X))/(3*4)+(3*4^2)/(3*4) = 0
3*(x-3)+4*(x-1)+3*4*(-X)+3*4^2 = 0
7*x-12*X-13+48 = 0
7*x-12*X+35 = 0
(7*x-12*X+35)/(3*4) = 0
(7*x-12*X+35)/(3*4) = 0 // * 3*4
7*x-12*X+35 = 0
7*x-12*X+35 = 0 // - 35-12*X
7*x = -(35-12*X) // : 7
x = (-(35-12*X))/7
x = (-(35-12*X))/7
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