-9a=18+4a

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Solution for -9a=18+4a equation: 



-9a=18+4a

We move all terms to the left:

-9a-(18+4a)=0

We add all the numbers together, and all the variables

-9a-(4a+18)=0

We get rid of parentheses

-9a-4a-18=0

We add all the numbers together, and all the variables

-13a-18=0

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

-13a=18

a=18/-13

a=-1+5/13

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