User contributions
- 08:24, 28 October 2015 (diff | hist) . . (+2) . . 2009 AMC 8 Problems (→Problem 19)
- 07:37, 28 October 2015 (diff | hist) . . (-2) . . 2009 AMC 8 Problems (→Problem 19: there are only 2 possible values of x)
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