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Solving a Rational Equation for a parameter - Problem 3

Teacher/Instructor Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

In many rational functions that represent real world situations, it is useful to solve for a certain parameter- that is, get one variable isolated. In order to do this, we try to "undo" what is being done to this variable. Often, if there are two equal fractions, we'll begin with the process of cross multiplication to get two equal products instead of a proportional relationship.

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