-4=a-15

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Solution for -4=a-15 equation: 



-4=a-15

We move all terms to the left:

-4-(a-15)=0

We get rid of parentheses

-a+15-4=0

We add all the numbers together, and all the variables

-1a+11=0

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

-a=-11

a=-11/-1

a=+11

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