(r+10)+2(r+10)+r=130

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Solution for (r+10)+2(r+10)+r=130 equation: 



(r+10)+2(r+10)+r=130

We move all terms to the left:

(r+10)+2(r+10)+r-(130)=0

We add all the numbers together, and all the variables

r+(r+10)+2(r+10)-130=0

We multiply parentheses

r+(r+10)+2r+20-130=0

We get rid of parentheses

r+r+2r+10+20-130=0

We add all the numbers together, and all the variables

4r-100=0

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

4r=100

r=100/4

r=25

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