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b in (-oo:+oo)
b/14 = 27/42 // - 27/42
b/14-(27/42) = 0
b/14-9/14 = 0
1/14*b-9/14 = 0 // + 9/14
1/14*b = 9/14 // : 1/14
b = 9/14/1/14
b = 9
b = 9
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