-5b+9=81+7b

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Solution for -5b+9=81+7b equation: 


b in (-oo:+oo)

9-5*b = 7*b+81 // - 7*b+81

9-5*b-(7*b)-81 = 0

9-5*b-7*b-81 = 0

-12*b-72 = 0 // + 72

-12*b = 72 // : -12

b = 72/(-12)

b = -6

b = -6

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