-8(-8-4r)=320

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Solution for -8(-8-4r)=320 equation: 



-8(-8-4r)=320

We move all terms to the left:

-8(-8-4r)-(320)=0

We add all the numbers together, and all the variables

-8(-4r-8)-320=0

We multiply parentheses

32r+64-320=0

We add all the numbers together, and all the variables

32r-256=0

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

32r=256

r=256/32

r=8

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