8=-4r+16

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Solution for 8=-4r+16 equation: 



8=-4r+16

We move all terms to the left:

8-(-4r+16)=0

We get rid of parentheses

4r-16+8=0

We add all the numbers together, and all the variables

4r-8=0

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

4r=8

r=8/4

r=2

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