-2(3+r)=12

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Solution for -2(3+r)=12 equation: 



-2(3+r)=12

We move all terms to the left:

-2(3+r)-(12)=0

We add all the numbers together, and all the variables

-2(r+3)-12=0

We multiply parentheses

-2r-6-12=0

We add all the numbers together, and all the variables

-2r-18=0

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

-2r=18

r=18/-2

r=-9

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