13-4=10r-11

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Solution for 13-4=10r-11 equation: 



13-4=10r-11

We move all terms to the left:

13-4-(10r-11)=0

We add all the numbers together, and all the variables

-(10r-11)+9=0

We get rid of parentheses

-10r+11+9=0

We add all the numbers together, and all the variables

-10r+20=0

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

-10r=-20

r=-20/-10

r=+2

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