4=-4r-16

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Solution for 4=-4r-16 equation: 



4=-4r-16

We move all terms to the left:

4-(-4r-16)=0

We get rid of parentheses

4r+16+4=0

We add all the numbers together, and all the variables

4r+20=0

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

4r=-20

r=-20/4

r=-5

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