3r+2=30-r

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Solution for 3r+2=30-r equation: 



3r+2=30-r

We move all terms to the left:

3r+2-(30-r)=0

We add all the numbers together, and all the variables

3r-(-1r+30)+2=0

We get rid of parentheses

3r+1r-30+2=0

We add all the numbers together, and all the variables

4r-28=0

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

4r=28

r=28/4

r=7

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