3=-16-r+7

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Solution for 3=-16-r+7 equation: 



3=-16-r+7

We move all terms to the left:

3-(-16-r+7)=0

We add all the numbers together, and all the variables

-(-1r-9)+3=0

We get rid of parentheses

1r+9+3=0

We add all the numbers together, and all the variables

r+12=0

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

r=-12

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