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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