-r-10=-10+2r-9

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Solution for -r-10=-10+2r-9 equation: 



-r-10=-10+2r-9

We move all terms to the left:

-r-10-(-10+2r-9)=0

We add all the numbers together, and all the variables

-r-(2r-19)-10=0

We add all the numbers together, and all the variables

-1r-(2r-19)-10=0

We get rid of parentheses

-1r-2r+19-10=0

We add all the numbers together, and all the variables

-3r+9=0

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

-3r=-9

r=-9/-3

r=+3

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