85=-5(1+3r)

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Solution for 85=-5(1+3r) equation: 



85=-5(1+3r)

We move all terms to the left:

85-(-5(1+3r))=0

We add all the numbers together, and all the variables

-(-5(3r+1))+85=0



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

-5(3r+1)

We multiply parentheses

-15r-5

Back to the equation:

-(-15r-5)



We get rid of parentheses

15r+5+85=0

We add all the numbers together, and all the variables

15r+90=0

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

15r=-90

r=-90/15

r=-6

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