11r+19=8r+31

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Solution for 11r+19=8r+31 equation: 



11r+19=8r+31

We move all terms to the left:

11r+19-(8r+31)=0

We get rid of parentheses

11r-8r-31+19=0

We add all the numbers together, and all the variables

3r-12=0

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

3r=12

r=12/3

r=4

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