Question 276574
There are 385 surfers in Surf City. 
Two thirds of the boys are surfers and one-twelfth of the girls
are surfers. 
If there are two girls for every boy, then how
many boys and how many girls are there in Surf City?
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Equations:
surfers + surfers = surfers
(2/3)b + (1/12)g = 385
g = 2b
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Modify the 1st equation:
8b + g = 12*385
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Substitute for "g" and solve for "b":
8b + 2b = 12*385
10b = 4620
b = 462  (# of boys)
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Since g = 2b, g = 924 (# of girls)
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Cheers,
Stan H.