Khan/khan-exercises — Issue #15288: Solving for a variable - I thought negatives were not allowed in denominators?
Author: KhanBugz
Created: 2012-03-03 05:17:55+00:00
State: open
Labels: hard, safari, snowleo

The answer that I got was the same as above, except that I had to multiply it all by -1 so that the denominator is no longer negative. The answer says that the denominator is supposed to be negative.

Why is this answer supposed to have a negative denominator?

[solving_for_a_variable.html?seed=41&problem=ABCD_EF](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_for_a_variable.html?seed=41&problem=ABCD_EF&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_for_a_variable.html?seed=41&problem=ABCD_EF&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22None%20of%20the%20above.%5C%22%22%2C236%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%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%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%5D)

["None of the above."]

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