-6a-9=6a+9

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Solution for -6a-9=6a+9 equation: 



-6a-9=6a+9

We move all terms to the left:

-6a-9-(6a+9)=0

We get rid of parentheses

-6a-6a-9-9=0

We add all the numbers together, and all the variables

-12a-18=0

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

-12a=18

a=18/-12

a=-1+1/2

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