-r+12=-7r-6(7+8r)

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Solution for -r+12=-7r-6(7+8r) equation: 



-r+12=-7r-6(7+8r)

We move all terms to the left:

-r+12-(-7r-6(7+8r))=0

We add all the numbers together, and all the variables

-r-(-7r-6(8r+7))+12=0

We add all the numbers together, and all the variables

-1r-(-7r-6(8r+7))+12=0



We calculate terms in parentheses: -(-7r-6(8r+7)), so:

-7r-6(8r+7)

We multiply parentheses

-7r-48r-42

We add all the numbers together, and all the variables

-55r-42

Back to the equation:

-(-55r-42)



We get rid of parentheses

-1r+55r+42+12=0

We add all the numbers together, and all the variables

54r+54=0

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

54r=-54

r=-54/54

r=-1

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