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March 3, 2015

March 3, 2015

Posted by **kia** on Friday, December 9, 2011 at 11:38am.

- math -
**Reiny**, Friday, December 9, 2011 at 11:52amlabel the intersection of the two circles as x

so the 23 includes the x and the 34 includes the x

equation:

50 = 23 + 34 - x + 3

x = 10

so 10 needed both brakes and tires, so

13 needed only brakes

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