Khan/khan-exercises — Issue #4708: Systems of equations - hints on exercises
Author: KhanBugz
Created: 2011-10-21 04:31:54+00:00
State: open
Labels: chrome, win7

i asked for 2 hints. the second one read:
"3
Recalling our knowledge of least common multiples, multiply the top equation by −2 and the bottom equation by
."

[systems_of_equations.html?seed=94&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations.html?seed=94&problem=0&debug)

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Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.202 Safari/535.1

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