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(3/4)*x+(1/2)*x-3 = (3/8)*x+1/4 // - (3/8)*x+1/4
(3/4)*x+(1/2)*x-((3/8)*x)-(1/4)-3 = 0
(3/4)*x+(1/2)*x+(-3/8)*x-1/4-3 = 0
7/8*x-13/4 = 0 // + 13/4
7/8*x = 13/4 // : 7/8
x = 13/4/7/8
x = 26/7
x = 26/7
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