30-2r=-2(r+6)-6r

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Solution for 30-2r=-2(r+6)-6r equation: 



30-2r=-2(r+6)-6r

We move all terms to the left:

30-2r-(-2(r+6)-6r)=0



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

-2(r+6)-6r

We add all the numbers together, and all the variables

-6r-2(r+6)

We multiply parentheses

-6r-2r-12

We add all the numbers together, and all the variables

-8r-12

Back to the equation:

-(-8r-12)



We get rid of parentheses

-2r+8r+12+30=0

We add all the numbers together, and all the variables

6r+42=0

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

6r=-42

r=-42/6

r=-7

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