-11=2+a

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Solution for -11=2+a equation: 



-11=2+a

We move all terms to the left:

-11-(2+a)=0

We add all the numbers together, and all the variables

-(a+2)-11=0

We get rid of parentheses

-a-2-11=0

We add all the numbers together, and all the variables

-1a-13=0

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

-a=13

a=13/-1

a=-13

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