Khan/khan-exercises — Issue #7672: Algebra challenge - how to do these probloms
Author: KhanBugz
Created: 2011-12-03 20:28:11+00:00
State: open
Labels: hard, ie8, ie9, win7

[algebra_challenge.html?seed=76&problem=19 (logarithms_1)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=76&problem=19&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=76&problem=19&debug&activity=%5B%5D)

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