3=-r+9

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Solution for 3=-r+9 equation: 



3=-r+9

We move all terms to the left:

3-(-r+9)=0

We add all the numbers together, and all the variables

-(-1r+9)+3=0

We get rid of parentheses

1r-9+3=0

We add all the numbers together, and all the variables

r-6=0

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

r=6

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