15-5=13-a

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Solution for 15-5=13-a equation: 



15-5=13-a

We move all terms to the left:

15-5-(13-a)=0

We add all the numbers together, and all the variables

-(-1a+13)+15-5=0

We add all the numbers together, and all the variables

-(-1a+13)+10=0

We get rid of parentheses

1a-13+10=0

We add all the numbers together, and all the variables

a-3=0

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

a=3

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