-4-r=-16

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Solution for -4-r=-16 equation: 



-4-r=-16

We move all terms to the left:

-4-r-(-16)=0

We add all the numbers together, and all the variables

-1r+12=0

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

-r=-12

r=-12/-1

r=+12

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