User contributions
- 07:24, 28 October 2015 (diff | hist) . . (+2) . . 2009 AMC 8 Problems (→Problem 19)
- 06:37, 28 October 2015 (diff | hist) . . (-2) . . 2009 AMC 8 Problems (→Problem 19: there are only 2 possible values of x)
Sign In
Register
math training & tools
Alcumus
Videos
For the Win!
MATHCOUNTS Trainer
AoPS Practice Contests
AoPS Wiki
LaTeX TeXeR
MIT PRIMES/CrowdMath
Keep Learning
Sign In
Register
