1=-7r-9

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Solution for 1=-7r-9 equation: 



1=-7r-9

We move all terms to the left:

1-(-7r-9)=0

We get rid of parentheses

7r+9+1=0

We add all the numbers together, and all the variables

7r+10=0

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

7r=-10

r=-10/7

r=-1+3/7

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