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b in (-oo:+oo)
2*(3*b+8) = 64 // - 64
2*(3*b+8)-64 = 0
2*(3*b+8)-64 = 0
6*b-48 = 0
6*b-48 = 0
6*b-48 = 0 // + 48
6*b = 48 // : 6
b = 48/6
b = 8
b = 8
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