-2(10r-2)=84

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Solution for -2(10r-2)=84 equation: 



-2(10r-2)=84

We move all terms to the left:

-2(10r-2)-(84)=0

We multiply parentheses

-20r+4-84=0

We add all the numbers together, and all the variables

-20r-80=0

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

-20r=80

r=80/-20

r=-4

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