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a in (-oo:+oo)
a/14 = 4/5 // - 4/5
a/14-(4/5) = 0
a/14-4/5 = 0
1/14*a-4/5 = 0 // + 4/5
1/14*a = 4/5 // : 1/14
a = 4/5/1/14
a = 56/5
a = 56/5
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