3=-2(6+r)

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Solution for 3=-2(6+r) equation: 



3=-2(6+r)

We move all terms to the left:

3-(-2(6+r))=0

We add all the numbers together, and all the variables

-(-2(r+6))+3=0



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

-2(r+6)

We multiply parentheses

-2r-12

Back to the equation:

-(-2r-12)



We get rid of parentheses

2r+12+3=0

We add all the numbers together, and all the variables

2r+15=0

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

2r=-15

r=-15/2

r=-7+1/2

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