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

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Solving a System of Linear Equations in Two Variables - Problem 9

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Solving a System of Linear Equations in Two Variables - Problem 8

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

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Three of the most classic word problems in algebra are mixture, percent mixture, and rate word problems. For the mixture and percent mixture, try writing one equation that represents amount only, and a second equation that represents amount times percent (or cost.) If the decimals are overwhelming, you can multiply an entire equation by, say 100 to make the decimals turn in to integers. For the rate problem, consider whether the rate is speeding up or slowing down the speed of the object. You will need to use the relationship "distance = rate times time" and see which of those three stays the same in your problem context.

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