8r+9=36-r

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Solution for 8r+9=36-r equation: 



8r+9=36-r

We move all terms to the left:

8r+9-(36-r)=0

We add all the numbers together, and all the variables

8r-(-1r+36)+9=0

We get rid of parentheses

8r+1r-36+9=0

We add all the numbers together, and all the variables

9r-27=0

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

9r=27

r=27/9

r=3

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