Khan/khan-exercises — Issue #12343: Expressions with unknown variables - scratchpad
Author: KhanBugz
Created: 2012-01-28 10:22:31+00:00
State: open
Labels: firefox, not-showing, win7

i try to write and it isnt working

[expressions_with_unknown_variables.html?seed=78&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/expressions_with_unknown_variables.html?seed=78&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/expressions_with_unknown_variables.html?seed=78&problem=0&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.1; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

MathJax is loaded, ready, queue length: 0