-20-13b=20-5b-12b

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Solution for -20-13b=20-5b-12b equation: 



-20-13b=20-5b-12b

We move all terms to the left:

-20-13b-(20-5b-12b)=0

We add all the numbers together, and all the variables

-13b-(-17b+20)-20=0

We get rid of parentheses

-13b+17b-20-20=0

We add all the numbers together, and all the variables

4b-40=0

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

4b=40

b=40/4

b=10

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