9a-5=7+8a

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Solution for 9a-5=7+8a equation: 



9a-5=7+8a

We move all terms to the left:

9a-5-(7+8a)=0

We add all the numbers together, and all the variables

9a-(8a+7)-5=0

We get rid of parentheses

9a-8a-7-5=0

We add all the numbers together, and all the variables

a-12=0

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

a=12

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