16+3r=31

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Solution for 16+3r=31 equation: 



16+3r=31

We move all terms to the left:

16+3r-(31)=0

We add all the numbers together, and all the variables

3r-15=0

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

3r=15

r=15/3

r=5

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