4+(-4a)+20=16

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Solution for 4+(-4a)+20=16 equation: 



4+(-4a)+20=16

We move all terms to the left:

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

We add all the numbers together, and all the variables

(-4a)+8=0

We get rid of parentheses

-4a+8=0

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

-4a=-8

a=-8/-4

a=+2

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