-1=2r+5

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Solution for -1=2r+5 equation: 



-1=2r+5

We move all terms to the left:

-1-(2r+5)=0

We get rid of parentheses

-2r-5-1=0

We add all the numbers together, and all the variables

-2r-6=0

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

-2r=6

r=6/-2

r=-3

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