3+9b=7+13b

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Solution for 3+9b=7+13b equation: 



3+9b=7+13b

We move all terms to the left:

3+9b-(7+13b)=0

We add all the numbers together, and all the variables

9b-(13b+7)+3=0

We get rid of parentheses

9b-13b-7+3=0

We add all the numbers together, and all the variables

-4b-4=0

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

-4b=4

b=4/-4

b=-1

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