9r=10r+7

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Solution for 9r=10r+7 equation: 



9r=10r+7

We move all terms to the left:

9r-(10r+7)=0

We get rid of parentheses

9r-10r-7=0

We add all the numbers together, and all the variables

-1r-7=0

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

-r=7

r=7/-1

r=-7

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