1=-13-r

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Solution for 1=-13-r equation: 



1=-13-r

We move all terms to the left:

1-(-13-r)=0

We add all the numbers together, and all the variables

-(-1r-13)+1=0

We get rid of parentheses

1r+13+1=0

We add all the numbers together, and all the variables

r+14=0

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

r=-14

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