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(3/4)*x-4 = (1/2)*x+7 // - (1/2)*x+7
(3/4)*x-((1/2)*x)-7-4 = 0
(3/4)*x+(-1/2)*x-7-4 = 0
1/4*x-11 = 0 // + 11
1/4*x = 11 // : 1/4
x = 11/1/4
x = 44
x = 44
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