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b in (-oo:+oo)
3*b-(5*b)-6 = -26 // + 26
3*b-(5*b)-6+26 = 0
3*b-5*b-6+26 = 0
20-2*b = 0 // - 20
-2*b = -20 // : -2
b = -20/(-2)
b = 10
b = 10
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