Khan/khan-exercises — Issue #14153: Systems of equations - Duplicate exercise
Author: KhanBugz
Created: 2012-02-18 23:07:50+00:00
State: open
Labels: other, win7

Reporter: kondo8@hotmail.com

Duplicate exercise of http://www.khanacademy.org/exercise/systems_of_equations_with_substitution

[systems_of_equations.html?seed=155&problem=substitution-y](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations.html?seed=155&problem=substitution-y&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations.html?seed=155&problem=substitution-y&debug&activity=%5B%5D)

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Opera/9.80 (Windows NT 6.1; U; Edition Next; en) Presto/2.10.255 Version/12.00

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