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3/4-5 = (7/8)*x // - (7/8)*x
3/4-((7/8)*x)-5 = 0
(-7/8)*x+3/4-5 = 0
-7/8*x-17/4 = 0 // + 17/4
-7/8*x = 17/4 // : -7/8
x = 17/4/(-7/8)
x = -34/7
x = -34/7
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