Khan/khan-exercises — Issue #12549: Systems of equations with elimination - ???
Author: KhanBugz
Created: 2012-01-31 15:10:47+00:00
State: open
Labels: ie8, win7, wrong-or-unclear

Reporter: msfight7891@hotmail.com

submitted answers are said to be wrong, showing steps says my answer was right. i checked on paper, but it still says its wrong.

[systems_of_equations_with_elimination.html?seed=90&problem=elimination-x](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations_with_elimination.html?seed=90&problem=elimination-x&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/systems_of_equations_with_elimination.html?seed=90&problem=elimination-x&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C192%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C7%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C15%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C33%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C1%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C1%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C1%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C1%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C1%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22-4%5C%22%5D%22%2C1%5D%5D)

[["1","-4"],["1","-4"],["1","-4"],["1","-4"],["1","-4"],["1","-4"],["1","-4"],["1","-4"],["1","-4"],["1","-4"]]

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB6.6; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; MDDR; InfoPath.2; .NET4.0C)

MathJax is loaded, ready, queue length: 0