7r=9r+10

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Solution for 7r=9r+10 equation: 



7r=9r+10

We move all terms to the left:

7r-(9r+10)=0

We get rid of parentheses

7r-9r-10=0

We add all the numbers together, and all the variables

-2r-10=0

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

-2r=10

r=10/-2

r=-5

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