4(-4r)=64

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Solution for 4(-4r)=64 equation: 



4(-4r)=64

We move all terms to the left:

4(-4r)-(64)=0

We multiply parentheses

-16r-64=0

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

-16r=64

r=64/-16

r=-4

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