3r-21=-37

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Solution for 3r-21=-37 equation: 



3r-21=-37

We move all terms to the left:

3r-21-(-37)=0

We add all the numbers together, and all the variables

3r+16=0

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

3r=-16

r=-16/3

r=-5+1/3

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