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b in (-oo:+oo)
-3*b-(1/4) = 8 // - 8
-3*b-(1/4)-8 = 0
-3*b-1/4-8 = 0
-3*b-33/4 = 0 // + 33/4
-3*b = 33/4 // : -3
b = 33/4/(-3)
b = -11/4
b = -11/4
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