117=3(-1+5r)

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Solution for 117=3(-1+5r) equation: 



117=3(-1+5r)

We move all terms to the left:

117-(3(-1+5r))=0

We add all the numbers together, and all the variables

-(3(5r-1))+117=0



We calculate terms in parentheses: -(3(5r-1)), so:

3(5r-1)

We multiply parentheses

15r-3

Back to the equation:

-(15r-3)



We get rid of parentheses

-15r+3+117=0

We add all the numbers together, and all the variables

-15r+120=0

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

-15r=-120

r=-120/-15

r=+8

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