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b in (-oo:+oo)
3 = (11/2)*b // - (11/2)*b
3-((11/2)*b) = 0
(-11/2)*b+3 = 0
3-11/2*b = 0 // - 3
-11/2*b = -3 // : -11/2
b = -3/(-11/2)
b = 6/11
b = 6/11
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