3r+3=39-r

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Solution for 3r+3=39-r equation: 



3r+3=39-r

We move all terms to the left:

3r+3-(39-r)=0

We add all the numbers together, and all the variables

3r-(-1r+39)+3=0

We get rid of parentheses

3r+1r-39+3=0

We add all the numbers together, and all the variables

4r-36=0

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

4r=36

r=36/4

r=9

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