4r-5=80

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Solution for 4r-5=80 equation: 



4r-5=80

We move all terms to the left:

4r-5-(80)=0

We add all the numbers together, and all the variables

4r-85=0

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

4r=85

r=85/4

r=21+1/4

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