9r=8r+4

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Solution for 9r=8r+4 equation: 



9r=8r+4

We move all terms to the left:

9r-(8r+4)=0

We get rid of parentheses

9r-8r-4=0

We add all the numbers together, and all the variables

r-4=0

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

r=4

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