4r+7=r-2

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Solution for 4r+7=r-2 equation: 



4r+7=r-2

We move all terms to the left:

4r+7-(r-2)=0

We get rid of parentheses

4r-r+2+7=0

We add all the numbers together, and all the variables

3r+9=0

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

3r=-9

r=-9/3

r=-3

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