16=r-4

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Solution for 16=r-4 equation: 



16=r-4

We move all terms to the left:

16-(r-4)=0

We get rid of parentheses

-r+4+16=0

We add all the numbers together, and all the variables

-1r+20=0

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

-r=-20

r=-20/-1

r=+20

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