-12=-6(1-3r)-2(7r+1)

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Solution for -12=-6(1-3r)-2(7r+1) equation: 



-12=-6(1-3r)-2(7r+1)

We move all terms to the left:

-12-(-6(1-3r)-2(7r+1))=0

We add all the numbers together, and all the variables

-(-6(-3r+1)-2(7r+1))-12=0



We calculate terms in parentheses: -(-6(-3r+1)-2(7r+1)), so:

-6(-3r+1)-2(7r+1)

We multiply parentheses

18r-14r-6-2

We add all the numbers together, and all the variables

4r-8

Back to the equation:

-(4r-8)



We get rid of parentheses

-4r+8-12=0

We add all the numbers together, and all the variables

-4r-4=0

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

-4r=4

r=4/-4

r=-1

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