9+2a=-3a-4a

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Solution for 9+2a=-3a-4a equation: 



9+2a=-3a-4a

We move all terms to the left:

9+2a-(-3a-4a)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

2a+7a+9=0

We add all the numbers together, and all the variables

9a+9=0

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

9a=-9

a=-9/9

a=-1

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