-2a=-9a-9a

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



-2a=-9a-9a

We move all terms to the left:

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

We add all the numbers together, and all the variables

-2a-(-18a)=0

We get rid of parentheses

-2a+18a=0

We add all the numbers together, and all the variables

16a=0

a=0/16

a=0

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