-3b+9=-1+7b

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Solution for -3b+9=-1+7b equation: 


b in (-oo:+oo)

9-3*b = 7*b-1 // - 7*b-1

1-3*b-(7*b)+9 = 0

1-3*b-7*b+9 = 0

10-10*b = 0 // - 10

-10*b = -10 // : -10

b = -10/(-10)

b = 1

b = 1

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