4r-9.2=18.8

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Solution for 4r-9.2=18.8 equation: 



4r-9.2=18.8

We move all terms to the left:

4r-9.2-(18.8)=0

We add all the numbers together, and all the variables

4r-28=0

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

4r=28

r=28/4

r=7

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