3r+9=8r-4

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Solution for 3r+9=8r-4 equation: 



3r+9=8r-4

We move all terms to the left:

3r+9-(8r-4)=0

We get rid of parentheses

3r-8r+4+9=0

We add all the numbers together, and all the variables

-5r+13=0

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

-5r=-13

r=-13/-5

r=2+3/5

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