16=-20-4a

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Solution for 16=-20-4a equation: 



16=-20-4a

We move all terms to the left:

16-(-20-4a)=0

We add all the numbers together, and all the variables

-(-4a-20)+16=0

We get rid of parentheses

4a+20+16=0

We add all the numbers together, and all the variables

4a+36=0

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

4a=-36

a=-36/4

a=-9

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