7r-20=-5r+20+2r

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Solution for 7r-20=-5r+20+2r equation: 



7r-20=-5r+20+2r

We move all terms to the left:

7r-20-(-5r+20+2r)=0

We add all the numbers together, and all the variables

7r-(-3r+20)-20=0

We get rid of parentheses

7r+3r-20-20=0

We add all the numbers together, and all the variables

10r-40=0

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

10r=40

r=40/10

r=4

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