11=-a+15

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Solution for 11=-a+15 equation: 



11=-a+15

We move all terms to the left:

11-(-a+15)=0

We add all the numbers together, and all the variables

-(-1a+15)+11=0

We get rid of parentheses

1a-15+11=0

We add all the numbers together, and all the variables

a-4=0

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

a=4

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