14 December 2009

• 19:3319:33, 14 December 2009 diff hist +16 m Mock AIME 2 2006-2007 Problems/Problem 13 →Solution
• 19:3219:32, 14 December 2009 diff hist +567 Mock AIME 2 2006-2007 Problems/Problem 13 No edit summary

19 May 2008

• 20:0820:08, 19 May 2008 diff hist −15 m Cramer's Rule Language more formal
• 20:0720:07, 19 May 2008 diff hist −64 m Cramer's Rule Changed variables to improve readability
• 20:0420:04, 19 May 2008 diff hist +26 Cramer's Rule →General Form for n variables
• 20:0320:03, 19 May 2008 diff hist +1,471 Cramer's Rule Added general case and example

18 February 2008

• 17:2017:20, 18 February 2008 diff hist −1 m 1989 AIME Problems/Problem 9 →Problem