Khan/khan-exercises — Issue #12934: Systems of equations - solution step three is missing 4
Author: KhanBugz
Created: 2012-02-02 21:03:09+00:00
State: open
Labels: firefox, other

Reporter: bozdag@hotmail.com

in step three of solution statement must be −4y−5−8y=−8 but it is −y−5−8y=−8. so first y should be multiplied by -4.

[systems_of_equations.html?seed=112&problem=substitution-x](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations.html?seed=112&problem=substitution-x&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations.html?seed=112&problem=substitution-x&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%223%5C%22%2C%5C%221%2F4%5C%22%5D%22%2C185%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C16%5D%2C%5B%22hint-activity%22%2C%220%22%2C27%5D%2C%5B%22hint-activity%22%2C%220%22%2C41%5D%2C%5B%22hint-activity%22%2C%220%22%2C76%5D%2C%5B%22hint-activity%22%2C%220%22%2C95%5D%2C%5B%22hint-activity%22%2C%220%22%2C149%5D%5D)

[["3","1/4"]]

Mozilla/5.0 (Ubuntu; X11; Linux x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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