3r=r-3

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Solution for 3r=r-3 equation: 



3r=r-3

We move all terms to the left:

3r-(r-3)=0

We get rid of parentheses

3r-r+3=0

We add all the numbers together, and all the variables

2r+3=0

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

2r=-3

r=-3/2

r=-1+1/2

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