9r+7=37-r

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Solution for 9r+7=37-r equation: 



9r+7=37-r

We move all terms to the left:

9r+7-(37-r)=0

We add all the numbers together, and all the variables

9r-(-1r+37)+7=0

We get rid of parentheses

9r+1r-37+7=0

We add all the numbers together, and all the variables

10r-30=0

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

10r=30

r=30/10

r=3

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