-16=a+-4

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Solution for -16=a+-4 equation: 



-16=a+-4

We move all terms to the left:

-16-(a+-4)=0

We add all the numbers together, and all the variables

-(a-4)-16=0

We get rid of parentheses

-a+4-16=0

We add all the numbers together, and all the variables

-1a-12=0

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

-a=12

a=12/-1

a=-12

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