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b in (-oo:+oo)
4 = b+3*(9/4) // - b+3*(9/4)
4-b-(3*(9/4)) = 0
4-b-27/4 = 0
-b-11/4 = 0 // + 11/4
-b = 11/4 // * -1
b = -11/4
b = -11/4
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