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b in (-oo:+oo)
-6*b-8 = 5*b+124 // - 5*b+124
-6*b-(5*b)-124-8 = 0
-6*b-5*b-124-8 = 0
-11*b-132 = 0 // + 132
-11*b = 132 // : -11
b = 132/(-11)
b = -12
b = -12
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