b+1-6b=21

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Solution for b+1-6b=21 equation: 


b in (-oo:+oo)

b-(6*b)+1 = 21 // - 21

b-(6*b)-21+1 = 0

b-6*b-21+1 = 0

-5*b-20 = 0 // + 20

-5*b = 20 // : -5

b = 20/(-5)

b = -4

b = -4

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