8r+18=66

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Solution for 8r+18=66 equation: 



8r+18=66

We move all terms to the left:

8r+18-(66)=0

We add all the numbers together, and all the variables

8r-48=0

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

8r=48

r=48/8

r=6

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