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b in (-oo:+oo)
b-((2/3)*b)+5/9 = 34/99 // - 34/99
b-((2/3)*b)+5/9-(34/99) = 0
(-2/3)*b+b+5/9-34/99 = 0
1/3*b+7/33 = 0 // - 7/33
1/3*b = -7/33 // : 1/3
b = -7/33/1/3
b = -7/11
b = -7/11
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