4r=30-9r

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Solution for 4r=30-9r equation: 



4r=30-9r

We move all terms to the left:

4r-(30-9r)=0

We add all the numbers together, and all the variables

4r-(-9r+30)=0

We get rid of parentheses

4r+9r-30=0

We add all the numbers together, and all the variables

13r-30=0

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

13r=30

r=30/13

r=2+4/13

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