9a+7=a-13

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Solution for 9a+7=a-13 equation: 



9a+7=a-13

We move all terms to the left:

9a+7-(a-13)=0

We get rid of parentheses

9a-a+13+7=0

We add all the numbers together, and all the variables

8a+20=0

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

8a=-20

a=-20/8

a=-2+1/2

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