-2=2(r-18)

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Solution for -2=2(r-18) equation: 



-2=2(r-18)

We move all terms to the left:

-2-(2(r-18))=0



We calculate terms in parentheses: -(2(r-18)), so:

2(r-18)

We multiply parentheses

2r-36

Back to the equation:

-(2r-36)



We get rid of parentheses

-2r+36-2=0

We add all the numbers together, and all the variables

-2r+34=0

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

-2r=-34

r=-34/-2

r=+17

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