13-2a=9-a

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Solution for 13-2a=9-a equation: 



13-2a=9-a

We move all terms to the left:

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

We add all the numbers together, and all the variables

-2a-(-1a+9)+13=0

We get rid of parentheses

-2a+1a-9+13=0

We add all the numbers together, and all the variables

-1a+4=0

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

-a=-4

a=-4/-1

a=+4

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