27=a+9

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Solution for 27=a+9 equation: 



27=a+9

We move all terms to the left:

27-(a+9)=0

We get rid of parentheses

-a-9+27=0

We add all the numbers together, and all the variables

-1a+18=0

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

-a=-18

a=-18/-1

a=+18

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