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b in (-oo:+oo)
(-1/3)*b+6 = 196/27-(6*b) // - 196/27-(6*b)
(-1/3)*b+6*b-(196/27)+6 = 0
(-1/3)*b+6*b-196/27+6 = 0
17/3*b-34/27 = 0 // + 34/27
17/3*b = 34/27 // : 17/3
b = 34/27/17/3
b = 2/9
b = 2/9
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