Khan/khan-exercises — Issue #9160: Systems of equations word problems - This problem seems to be wrong
Author: KhanBugz
Created: 2011-12-21 04:03:55+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Reporter: arlemagne1@gmail.com

I couldn't figure this one out. I derived that 0y=0. This gave me no information on how to proceed further. I clicked hints. It seems to have an error.

[systems_of_equations_word_problems.html?seed=60&problem=elimination-x](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations_word_problems.html?seed=60&problem=elimination-x&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations_word_problems.html?seed=60&problem=elimination-x&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C180%5D%2C%5B%22hint-activity%22%2C%220%22%2C180%5D%2C%5B%22hint-activity%22%2C%220%22%2C180%5D%2C%5B%22hint-activity%22%2C%220%22%2C181%5D%2C%5B%22hint-activity%22%2C%220%22%2C186%5D%2C%5B%22hint-activity%22%2C%220%22%2C186%5D%2C%5B%22hint-activity%22%2C%220%22%2C186%5D%2C%5B%22hint-activity%22%2C%220%22%2C186%5D%2C%5B%22correct-activity%22%2C%22%5B%5C%224%5C%22%2C%5C%227%5C%22%5D%22%2C206%5D%5D)

[["4","7"]]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0

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