4(r+20)=-(-4r-80)

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Solution for 4(r+20)=-(-4r-80) equation: 



4(r+20)=-(-4r-80)

We move all terms to the left:

4(r+20)-(-(-4r-80))=0

We multiply parentheses

4r-(-(-4r-80))+80=0



We calculate terms in parentheses: -(-(-4r-80)), so:

-(-4r-80)

We get rid of parentheses

4r+80

Back to the equation:

-(4r+80)



We get rid of parentheses

4r-4r-80+80=0

We add all the numbers together, and all the variables

=0

r=0/1

r=0

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