10r-20=-5(-4r+4)-10r

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Solution for 10r-20=-5(-4r+4)-10r equation: 



10r-20=-5(-4r+4)-10r

We move all terms to the left:

10r-20-(-5(-4r+4)-10r)=0



We calculate terms in parentheses: -(-5(-4r+4)-10r), so:

-5(-4r+4)-10r

We add all the numbers together, and all the variables

-10r-5(-4r+4)

We multiply parentheses

-10r+20r-20

We add all the numbers together, and all the variables

10r-20

Back to the equation:

-(10r-20)



We get rid of parentheses

10r-10r+20-20=0

We add all the numbers together, and all the variables

=0

r=0/1

r=0

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