Khan/khan-exercises — Issue #10642: Linear equations 3 - Confusion over the negative
Author: KhanBugz
Created: 2012-01-08 06:07:03+00:00
State: open
Labels: firefox, hard, win7

When subtracting 4x from 4x, why does the other 4 in the equation being subtracted become negative?

[linear_equations_3.html?seed=136&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/linear_equations_3.html?seed=136&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/linear_equations_3.html?seed=136&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%22-2%2F3%5C%22%5D%22%2C74%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%22-2%2F3%5C%22%5D%22%2C80%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C470%5D%2C%5B%22hint-activity%22%2C%220%22%2C471%5D%5D)

[["-2/3"],["-2/3"]]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0.1) Gecko/20100101 Firefox/8.0.1

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