4r+9=39-r

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Solution for 4r+9=39-r equation: 



4r+9=39-r

We move all terms to the left:

4r+9-(39-r)=0

We add all the numbers together, and all the variables

4r-(-1r+39)+9=0

We get rid of parentheses

4r+1r-39+9=0

We add all the numbers together, and all the variables

5r-30=0

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

5r=30

r=30/5

r=6

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