-18=(-r+6)+2r

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Solution for -18=(-r+6)+2r equation: 



-18=(-r+6)+2r

We move all terms to the left:

-18-((-r+6)+2r)=0

We add all the numbers together, and all the variables

-((-1r+6)+2r)-18=0



We calculate terms in parentheses: -((-1r+6)+2r), so:

(-1r+6)+2r

We add all the numbers together, and all the variables

2r+(-1r+6)

We get rid of parentheses

2r-1r+6

We add all the numbers together, and all the variables

r+6

Back to the equation:

-(r+6)



We get rid of parentheses

-r-6-18=0

We add all the numbers together, and all the variables

-1r-24=0

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

-r=24

r=24/-1

r=-24

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