-4(5-4r)=40+4r

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Solution for -4(5-4r)=40+4r equation: 



-4(5-4r)=40+4r

We move all terms to the left:

-4(5-4r)-(40+4r)=0

We add all the numbers together, and all the variables

-4(-4r+5)-(4r+40)=0

We multiply parentheses

16r-(4r+40)-20=0

We get rid of parentheses

16r-4r-40-20=0

We add all the numbers together, and all the variables

12r-60=0

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

12r=60

r=60/12

r=5

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