-2r=-10-r

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Solution for -2r=-10-r equation: 



-2r=-10-r

We move all terms to the left:

-2r-(-10-r)=0

We add all the numbers together, and all the variables

-2r-(-1r-10)=0

We get rid of parentheses

-2r+1r+10=0

We add all the numbers together, and all the variables

-1r+10=0

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

-r=-10

r=-10/-1

r=+10

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