Khan/khan-exercises — Issue #10698: Systems of equations with substitution - Making the linear equation. (step 2)
Author: KhanBugz
Created: 2012-01-09 00:31:00+00:00
State: open
Labels: chrome, other, win7

So after we find the isolated variable... We have to combine the equation right? Well... I don't really get how to do that

[systems_of_equations_with_substitution.html?seed=68&problem=substitution-y](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations_with_substitution.html?seed=68&problem=substitution-y&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations_with_substitution.html?seed=68&problem=substitution-y&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7

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