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7-((3/5)*x) = 154/5-4*x // - 154/5-4*x
7-((3/5)*x)-(-4*x)-(154/5) = 0
(-3/5)*x+4*x-154/5+7 = 0
17/5*x-119/5 = 0 // + 119/5
17/5*x = 119/5 // : 17/5
x = 119/5/17/5
x = 7
x = 7
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