5a+7=15+a

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Solution for 5a+7=15+a equation: 



5a+7=15+a

We move all terms to the left:

5a+7-(15+a)=0

We add all the numbers together, and all the variables

5a-(a+15)+7=0

We get rid of parentheses

5a-a-15+7=0

We add all the numbers together, and all the variables

4a-8=0

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

4a=8

a=8/4

a=2

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