8r+4r-r=55

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Solution for 8r+4r-r=55 equation: 



8r+4r-r=55

We move all terms to the left:

8r+4r-r-(55)=0

We add all the numbers together, and all the variables

11r-55=0

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

11r=55

r=55/11

r=5

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