5r+7=31-r

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Solution for 5r+7=31-r equation: 



5r+7=31-r

We move all terms to the left:

5r+7-(31-r)=0

We add all the numbers together, and all the variables

5r-(-1r+31)+7=0

We get rid of parentheses

5r+1r-31+7=0

We add all the numbers together, and all the variables

6r-24=0

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

6r=24

r=24/6

r=4

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