13=11-3r

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Solution for 13=11-3r equation:



13=11-3r
We move all terms to the left:
13-(11-3r)=0
We add all the numbers together, and all the variables
-(-3r+11)+13=0
We get rid of parentheses
3r-11+13=0
We add all the numbers together, and all the variables
3r+2=0
We move all terms containing r to the left, all other terms to the right
3r=-2
r=-2/3
r=-2/3

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