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b in (-oo:+oo)
(5/6)*b-((1/2)*b)-(5/9) = -29/9 // + -29/9
(5/6)*b-((1/2)*b)-(5/9)-(-29/9) = 0
(5/6)*b+(-1/2)*b-5/9+29/9 = 0
1/3*b+8/3 = 0 // - 8/3
1/3*b = -8/3 // : 1/3
b = -8/3/1/3
b = -8
b = -8
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