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