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(1/3)*(5*x-3) = (1/4)*(7*x-4) // - (1/4)*(7*x-4)
(1/3)*(5*x-3)-((1/4)*(7*x-4)) = 0
(1/3)*(5*x-3)+(-1/4)*(7*x-4) = 0
1/3*(5*x-3)-1/4*(7*x-4) = 0
1/3*(5*x-3)-1/4*(7*x-4) = 0
-1/12*x = 0
-x/12 = 0
-x/12 = 0 // * 12
-x = 0
-1*x = 0 // : -1
x = 0
x = 0
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