4b-1=-21

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Solution for 4b-1=-21 equation: 



4b-1=-21

We move all terms to the left:

4b-1-(-21)=0

We add all the numbers together, and all the variables

4b+20=0

We move all terms containing b to the left, all other terms to the right

4b=-20

b=-20/4

b=-5

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