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b in (-oo:+oo)
b+6*b+3/5 = -37/55 // + -37/55
b+6*b+3/5-(-37/55) = 0
b+6*b+3/5+37/55 = 0
7*b+14/11 = 0 // - 14/11
7*b = -14/11 // : 7
b = -14/11/7
b = -2/11
b = -2/11
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