-80=4-12r

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Solution for -80=4-12r equation: 



-80=4-12r

We move all terms to the left:

-80-(4-12r)=0

We add all the numbers together, and all the variables

-(-12r+4)-80=0

We get rid of parentheses

12r-4-80=0

We add all the numbers together, and all the variables

12r-84=0

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

12r=84

r=84/12

r=7

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