-108=6(3-7r)+3r

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Solution for -108=6(3-7r)+3r equation: 



-108=6(3-7r)+3r

We move all terms to the left:

-108-(6(3-7r)+3r)=0

We add all the numbers together, and all the variables

-(6(-7r+3)+3r)-108=0



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

6(-7r+3)+3r

We add all the numbers together, and all the variables

3r+6(-7r+3)

We multiply parentheses

3r-42r+18

We add all the numbers together, and all the variables

-39r+18

Back to the equation:

-(-39r+18)



We get rid of parentheses

39r-18-108=0

We add all the numbers together, and all the variables

39r-126=0

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

39r=126

r=126/39

r=3+3/13

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