3(5r+7)=30+2r

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Solution for 3(5r+7)=30+2r equation: 



3(5r+7)=30+2r

We move all terms to the left:

3(5r+7)-(30+2r)=0

We add all the numbers together, and all the variables

3(5r+7)-(2r+30)=0

We multiply parentheses

15r-(2r+30)+21=0

We get rid of parentheses

15r-2r-30+21=0

We add all the numbers together, and all the variables

13r-9=0

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

13r=9

r=9/13

r=9/13

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