-2b-1=-1+7b

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Solution for -2b-1=-1+7b equation: 


b in (-oo:+oo)

-2*b-1 = 7*b-1 // - 7*b-1

1-2*b-(7*b)-1 = 0

1-2*b-7*b-1 = 0

-9*b = 0 // : -9

b = 0

b = 0

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