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2*7*x = 12/5 // - 12/5
2*7*x-(12/5) = 0
2*7*x-12/5 = 0
14*x-12/5 = 0 // + 12/5
14*x = 12/5 // : 14
x = 12/5/14
x = 6/35
x = 6/35
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