Khan/khan-exercises — Issue #7065: Linear equations 4 - Length of time to complete.
Author: KhanBugz
Created: 2011-11-25 19:33:07+00:00
State: open
Labels: firefox, hard, win7

When I got 10 wright in linear
equations 4 and it still wouldn't let me become proficient.

[linear_equations_4.html?seed=145&problem=x-on-bottom](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/linear_equations_4.html?seed=145&problem=x-on-bottom&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/linear_equations_4.html?seed=145&problem=x-on-bottom&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0.2) Gecko/20100101 Firefox/6.0.2

MathJax is loaded, ready, queue length: 0