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7-((3/5)*x) = -14 // + 14
7-((3/5)*x)+14 = 0
(-3/5)*x+7+14 = 0
21-3/5*x = 0 // - 21
-3/5*x = -21 // : -3/5
x = -21/(-3/5)
x = 35
x = 35
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