8r+1=57

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Solution for 8r+1=57 equation: 



8r+1=57

We move all terms to the left:

8r+1-(57)=0

We add all the numbers together, and all the variables

8r-56=0

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

8r=56

r=56/8

r=7

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