-390=6(8r-1)

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Solution for -390=6(8r-1) equation: 



-390=6(8r-1)

We move all terms to the left:

-390-(6(8r-1))=0



We calculate terms in parentheses: -(6(8r-1)), so:

6(8r-1)

We multiply parentheses

48r-6

Back to the equation:

-(48r-6)



We get rid of parentheses

-48r+6-390=0

We add all the numbers together, and all the variables

-48r-384=0

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

-48r=384

r=384/-48

r=-8

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