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w in (-oo:+oo)
(2/3)*w+1/9 = 23/99 // - 23/99
(2/3)*w+1/9-(23/99) = 0
(2/3)*w+1/9-23/99 = 0
2/3*w-4/33 = 0 // + 4/33
2/3*w = 4/33 // : 2/3
w = 4/33/2/3
w = 2/11
w = 2/11
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