-20=-5b+b

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Solution for -20=-5b+b equation: 



-20=-5b+b

We move all terms to the left:

-20-(-5b+b)=0

We add all the numbers together, and all the variables

-(-4b)-20=0

We get rid of parentheses

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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