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b in (-oo:+oo)
7*b+6 = 73/11 // - 73/11
7*b-(73/11)+6 = 0
7*b-73/11+6 = 0
7*b-7/11 = 0 // + 7/11
7*b = 7/11 // : 7
b = 7/11/7
b = 1/11
b = 1/11
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