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b in (-oo:+oo)
(-2/3)*b+1 = 23/33 // - 23/33
(-2/3)*b-(23/33)+1 = 0
(-2/3)*b-23/33+1 = 0
10/33-2/3*b = 0 // - 10/33
-2/3*b = -10/33 // : -2/3
b = -10/33/(-2/3)
b = 5/11
b = 5/11
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