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7/4-((7/8)*x) = 5/2 // - 5/2
7/4-((7/8)*x)-(5/2) = 0
(-7/8)*x+7/4-5/2 = 0
-7/8*x-3/4 = 0 // + 3/4
-7/8*x = 3/4 // : -7/8
x = 3/4/(-7/8)
x = -6/7
x = -6/7
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