13-2a=4+a

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Solution for 13-2a=4+a equation: 



13-2a=4+a

We move all terms to the left:

13-2a-(4+a)=0

We add all the numbers together, and all the variables

-2a-(a+4)+13=0

We get rid of parentheses

-2a-a-4+13=0

We add all the numbers together, and all the variables

-3a+9=0

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

-3a=-9

a=-9/-3

a=+3

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