13=5-3b-13

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Solution for 13=5-3b-13 equation: 



13=5-3b-13

We move all terms to the left:

13-(5-3b-13)=0

We add all the numbers together, and all the variables

-(-3b-8)+13=0

We get rid of parentheses

3b+8+13=0

We add all the numbers together, and all the variables

3b+21=0

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

3b=-21

b=-21/3

b=-7

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