1+r-2=-13-r

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Solution for 1+r-2=-13-r equation: 



1+r-2=-13-r

We move all terms to the left:

1+r-2-(-13-r)=0

We add all the numbers together, and all the variables

r-(-1r-13)+1-2=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

r+1r+13-1=0

We add all the numbers together, and all the variables

2r+12=0

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

2r=-12

r=-12/2

r=-6

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