-2r+8/4=-40

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Solution for -2r+8/4=-40 equation: 



-2r+8/4=-40

We move all terms to the left:

-2r+8/4-(-40)=0

We add all the numbers together, and all the variables

-2r+42=0

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

-2r=-42

r=-42/-2

r=+21

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