9+7a=1+8a

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Solution for 9+7a=1+8a equation: 



9+7a=1+8a

We move all terms to the left:

9+7a-(1+8a)=0

We add all the numbers together, and all the variables

7a-(8a+1)+9=0

We get rid of parentheses

7a-8a-1+9=0

We add all the numbers together, and all the variables

-1a+8=0

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

-a=-8

a=-8/-1

a=+8

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