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b in (-oo:+oo)
5*b+4 = 6*b+11/3 // - 6*b+11/3
5*b-(6*b)-(11/3)+4 = 0
5*b-6*b-11/3+4 = 0
1/3-b = 0 // - 1/3
-b = -1/3 // * -1
b = 1/3
b = 1/3
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