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b in (-oo:+oo)
2-3*b = 11/4 // - 11/4
2-3*b-(11/4) = 0
2-3*b-11/4 = 0
-3*b-3/4 = 0 // + 3/4
-3*b = 3/4 // : -3
b = 3/4/(-3)
b = -1/4
b = -1/4
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