3.r+16=31

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Solution for 3.r+16=31 equation: 



3.r+16=31

We move all terms to the left:

3.r+16-(31)=0

We add all the numbers together, and all the variables

3.r-15=0

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

3.r=15

r=15/3.

r=5

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