4(r-20)=-16

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Solution for 4(r-20)=-16 equation: 



4(r-20)=-16

We move all terms to the left:

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

We add all the numbers together, and all the variables

4(r-20)+16=0

We multiply parentheses

4r-80+16=0

We add all the numbers together, and all the variables

4r-64=0

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

4r=64

r=64/4

r=16

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