13=2(b-13)-9

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Solution for 13=2(b-13)-9 equation: 



13=2(b-13)-9

We move all terms to the left:

13-(2(b-13)-9)=0



We calculate terms in parentheses: -(2(b-13)-9), so:

2(b-13)-9

We multiply parentheses

2b-26-9

We add all the numbers together, and all the variables

2b-35

Back to the equation:

-(2b-35)



We get rid of parentheses

-2b+35+13=0

We add all the numbers together, and all the variables

-2b+48=0

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

-2b=-48

b=-48/-2

b=+24

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