-9r=-10r+9

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



-9r=-10r+9

We move all terms to the left:

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

We get rid of parentheses

-9r+10r-9=0

We add all the numbers together, and all the variables

r-9=0

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

r=9

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