-4b+5=4b+21

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Solution for -4b+5=4b+21 equation: 



-4b+5=4b+21

We move all terms to the left:

-4b+5-(4b+21)=0

We get rid of parentheses

-4b-4b-21+5=0

We add all the numbers together, and all the variables

-8b-16=0

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

-8b=16

b=16/-8

b=-2

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