7r-(2r+20)=20

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Solution for 7r-(2r+20)=20 equation: 



7r-(2r+20)=20

We move all terms to the left:

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

We get rid of parentheses

7r-2r-20-20=0

We add all the numbers together, and all the variables

5r-40=0

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

5r=40

r=40/5

r=8

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