-7b-1+5b=21

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Solution for -7b-1+5b=21 equation: 


b in (-oo:+oo)

5*b-7*b-1 = 21 // - 21

5*b-7*b-21-1 = 0

-2*b-22 = 0 // + 22

-2*b = 22 // : -2

b = 22/(-2)

b = -11

b = -11

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