2007 AIME II Problems/Problem 4
The workers in a factory produce widgets and whoosits. For each product, production time is constant and identical for all workers, but not necessarily equal for the two products. In one hour, workers can produce widgets and whoosits. In two hours, workers can produce widgets and whoosits. In three hours, workers can produce widgets and whoosits. Find .
Suppose that it takes hours for one worker to create one widget, and hours for one worker to create one whoosit.
Therefore, we can write that (note that two hours is similar to having twice the number of workers, and so on):
Solve the system of equations with the first two equations to find that . Substitute this into the third equation to find that , so .
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