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7-((4/5)*x) = 3/5 // - 3/5
7-((4/5)*x)-(3/5) = 0
(-4/5)*x-3/5+7 = 0
32/5-4/5*x = 0 // - 32/5
-4/5*x = -32/5 // : -4/5
x = -32/5/(-4/5)
x = 8
x = 8
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