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Here is a site that clearly and thoroughly explains how to solve word problems that lead to systems of equations, such as mixture, coin, investment, and upstream/downstream problems. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to students who have been absent or who need additional instruction on this or many other topics.
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- Knovation Readability Score: 2 (1 low difficulty, 5 high difficulty)