Khan/khan-exercises — Issue #11564: Solving for a variable - soving for a variable 
Author: KhanBugz
Created: 2012-01-18 23:31:58+00:00
State: open
Labels: firefox, other, win7

Reporter: marshallfitness@hotmail.com

at the end of some problems you are instructed to reduce answer by -1, but no explanation as to why. so I really never know when to do it.

[solving_for_a_variable.html?seed=75&problem=ABCD_EF](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_for_a_variable.html?seed=75&problem=ABCD_EF&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_for_a_variable.html?seed=75&problem=ABCD_EF&debug&activity=%5B%5D)

[]

Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.25) Gecko/20111212 Firefox/3.6.25

MathJax is loaded, ready, queue length: 0