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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-9r-(-2r+10)-81=0

We get rid of parentheses

-9r+2r-10-81=0

We add all the numbers together, and all the variables

-7r-91=0

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

-7r=91

r=91/-7

r=-13

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