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b in (-oo:+oo)
(2/3)*b-b+5/9 = 82/99 // - 82/99
(2/3)*b-b+5/9-(82/99) = 0
(2/3)*b-b+5/9-82/99 = 0
-1/3*b-3/11 = 0 // + 3/11
-1/3*b = 3/11 // : -1/3
b = 3/11/(-1/3)
b = -9/11
b = -9/11
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