117=-3(5r-4)

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Solution for 117=-3(5r-4) equation: 



117=-3(5r-4)

We move all terms to the left:

117-(-3(5r-4))=0



We calculate terms in parentheses: -(-3(5r-4)), so:

-3(5r-4)

We multiply parentheses

-15r+12

Back to the equation:

-(-15r+12)



We get rid of parentheses

15r-12+117=0

We add all the numbers together, and all the variables

15r+105=0

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

15r=-105

r=-105/15

r=-7

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