9+a=-2a-9-7a

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Solution for 9+a=-2a-9-7a equation: 



9+a=-2a-9-7a

We move all terms to the left:

9+a-(-2a-9-7a)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

a+9a+9+9=0

We add all the numbers together, and all the variables

10a+18=0

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

10a=-18

a=-18/10

a=-1+4/5

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