4r-36=72

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Solution for 4r-36=72 equation: 



4r-36=72

We move all terms to the left:

4r-36-(72)=0

We add all the numbers together, and all the variables

4r-108=0

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

4r=108

r=108/4

r=27

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