Khan/khan-exercises — Issue #14105: Solving for a variable - Solving for variable negative denominator
Author: KhanBugz
Created: 2012-02-18 01:43:17+00:00
State: open
Labels: firefox, other, win7

Why does the denominator have to be positive? Why are variables in the denominator allowed to be negative?

[solving_for_a_variable.html?seed=82&problem=GABC_DEF](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_for_a_variable.html?seed=82&problem=GABC_DEF&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_for_a_variable.html?seed=82&problem=GABC_DEF&debug&activity=%5B%5B%22correct-activity%22%2C%22%5C%22%3Ccode%20style%3D%5C%5C%5C%22display%3A%20none%3B%5C%5C%5C%22%3Eg%3D%20%5C%5C%5C%5Cdfrac%7Bh%20%2B%205i%20-%205%7D%7B4%7D%3C%2Fcode%3E%5C%22%22%2C135%5D%5D)

["g= \\dfrac{h + 5i - 5}{4}"]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2

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