13r+11=158-8r

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Solution for 13r+11=158-8r equation: 



13r+11=158-8r

We move all terms to the left:

13r+11-(158-8r)=0

We add all the numbers together, and all the variables

13r-(-8r+158)+11=0

We get rid of parentheses

13r+8r-158+11=0

We add all the numbers together, and all the variables

21r-147=0

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

21r=147

r=147/21

r=7

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