9r=10r-2

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Solution for 9r=10r-2 equation: 



9r=10r-2

We move all terms to the left:

9r-(10r-2)=0

We get rid of parentheses

9r-10r+2=0

We add all the numbers together, and all the variables

-1r+2=0

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

-r=-2

r=-2/-1

r=+2

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