-142=-6r+7(-2r-6)

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Solution for -142=-6r+7(-2r-6) equation: 



-142=-6r+7(-2r-6)

We move all terms to the left:

-142-(-6r+7(-2r-6))=0



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

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

We multiply parentheses

-6r-14r-42

We add all the numbers together, and all the variables

-20r-42

Back to the equation:

-(-20r-42)



We get rid of parentheses

20r+42-142=0

We add all the numbers together, and all the variables

20r-100=0

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

20r=100

r=100/20

r=5

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