3r-9=10r+30

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Solution for 3r-9=10r+30 equation: 



3r-9=10r+30

We move all terms to the left:

3r-9-(10r+30)=0

We get rid of parentheses

3r-10r-30-9=0

We add all the numbers together, and all the variables

-7r-39=0

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

-7r=39

r=39/-7

r=-5+4/7

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