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b in (-oo:+oo)
6*b+8 = 64/5 // - 64/5
6*b-(64/5)+8 = 0
6*b-64/5+8 = 0
6*b-24/5 = 0 // + 24/5
6*b = 24/5 // : 6
b = 24/5/6
b = 4/5
b = 4/5
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