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April 18, 2015

April 18, 2015

Posted by **zach** on Monday, September 14, 2009 at 7:11am.

- math -
**drwls**, Monday, September 14, 2009 at 7:28amYou can get the answer by using algebra or by guessing the number of black and seeing what works.

Perhaps you are not learning algebra yet.

If I guess there are 5 black hats, then there are 8 red ones and 1 purple one. The sum is 14. So that's the answer.

- math -
**Dr Russ**, Monday, September 14, 2009 at 7:30amB+3=R

B-4=P

B+P+R=14

substitute for P and R

(B)+(B-4)+(B+3)=14

3B-1=14

solve from here

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