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10*(x+7/5) = 10*((3*x)/10) // - 10*((3*x)/10)
10*(x+7/5)-(10*((3*x)/10)) = 0
10*(x+7/5)-3*x = 0
10*(x+7/5)-3*x = 0
7*x+14 = 0
7*x+14 = 0
7*x+14 = 0 // - 14
7*x = -14 // : 7
x = -14/7
x = -2
x = -2
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