-1=-3(3r-8)-7

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Solution for -1=-3(3r-8)-7 equation: 



-1=-3(3r-8)-7

We move all terms to the left:

-1-(-3(3r-8)-7)=0



We calculate terms in parentheses: -(-3(3r-8)-7), so:

-3(3r-8)-7

We multiply parentheses

-9r+24-7

We add all the numbers together, and all the variables

-9r+17

Back to the equation:

-(-9r+17)



We get rid of parentheses

9r-17-1=0

We add all the numbers together, and all the variables

9r-18=0

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

9r=18

r=18/9

r=2

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