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b in (-oo:+oo)
-b-(5/8) = 3*b+27/8 // - 3*b+27/8
-b-(3*b)-(5/8)-(27/8) = 0
-b-3*b-5/8-27/8 = 0
-4*b-4 = 0 // + 4
-4*b = 4 // : -4
b = 4/(-4)
b = -1
b = -1
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