r+3=2r+1

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Solution for r+3=2r+1 equation: 



r+3=2r+1

We move all terms to the left:

r+3-(2r+1)=0

We get rid of parentheses

r-2r-1+3=0

We add all the numbers together, and all the variables

-1r+2=0

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

-r=-2

r=-2/-1

r=+2

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