4=b-17

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Solution for 4=b-17 equation: 



4=b-17

We move all terms to the left:

4-(b-17)=0

We get rid of parentheses

-b+17+4=0

We add all the numbers together, and all the variables

-1b+21=0

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

-b=-21

b=-21/-1

b=+21

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