-73=7-4r

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Solution for -73=7-4r equation: 



-73=7-4r

We move all terms to the left:

-73-(7-4r)=0

We add all the numbers together, and all the variables

-(-4r+7)-73=0

We get rid of parentheses

4r-7-73=0

We add all the numbers together, and all the variables

4r-80=0

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

4r=80

r=80/4

r=20

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