5a+7=15+7a

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



5a+7=15+7a

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

5a-7a-15+7=0

We add all the numbers together, and all the variables

-2a-8=0

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

-2a=8

a=8/-2

a=-4

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