65+4r-1=180

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Solution for 65+4r-1=180 equation: 



65+4r-1=180

We move all terms to the left:

65+4r-1-(180)=0

We add all the numbers together, and all the variables

4r-116=0

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

4r=116

r=116/4

r=29

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