-5-5(-4r-1)=80

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Solution for -5-5(-4r-1)=80 equation: 



-5-5(-4r-1)=80

We move all terms to the left:

-5-5(-4r-1)-(80)=0

We add all the numbers together, and all the variables

-5(-4r-1)-85=0

We multiply parentheses

20r+5-85=0

We add all the numbers together, and all the variables

20r-80=0

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

20r=80

r=80/20

r=4

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