5r+20=55

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Solution for 5r+20=55 equation: 



5r+20=55

We move all terms to the left:

5r+20-(55)=0

We add all the numbers together, and all the variables

5r-35=0

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

5r=35

r=35/5

r=7

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