-66=-6(5+2r)

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Solution for -66=-6(5+2r) equation: 



-66=-6(5+2r)

We move all terms to the left:

-66-(-6(5+2r))=0

We add all the numbers together, and all the variables

-(-6(2r+5))-66=0



We calculate terms in parentheses: -(-6(2r+5)), so:

-6(2r+5)

We multiply parentheses

-12r-30

Back to the equation:

-(-12r-30)



We get rid of parentheses

12r+30-66=0

We add all the numbers together, and all the variables

12r-36=0

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

12r=36

r=36/12

r=3

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