Khan/khan-exercises — Issue #4064: Rate problems 1 - Rate problem travel by bike and motorbike
Author: KhanBugz
Created: 2011-10-09 20:05:32+00:00
State: open
Labels: ie8, ie9, win7

Reporter: sheila.lemottee@gmail.com

The hints say add the 2 orange equations together:
add dm + db = 198
and -dm -(18/44)* db = 90
to get (26/44)* db = 90

I don't understand how you get 26/44

[rate_problems_1.html?seed=87&problem=3](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/rate_problems_1.html?seed=87&problem=3)

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