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(1/4)*x-((7/8)*x) = 25-55 // - 25-55
(1/4)*x-((7/8)*x)-25+55 = 0
(1/4)*x+(-7/8)*x-25+55 = 0
30-5/8*x = 0 // - 30
-5/8*x = -30 // : -5/8
x = -30/(-5/8)
x = 48
x = 48
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