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(1/3)*(5*x+3)-((1/4)*(x+5)) = 4 // - 4
(1/3)*(5*x+3)-((1/4)*(x+5))-4 = 0
(1/3)*(5*x+3)+(-1/4)*(x+5)-4 = 0
1/3*(5*x+3)-1/4*(x+5)-4 = 0
1/3*(5*x+3)-1/4*(x+5)-4 = 0
17/12*x-4-1/4 = 0
17/12*x-17/4 = 0
17/12*x-17/4 = 0
17/12*x-17/4 = 0 // + 17/4
17/12*x = 17/4 // : 17/12
x = 17/4/17/12
x = 3
x = 3
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