Lesson: Solving Systems of Equations by the Substitution ...

First, explain to students that they will need to use the problem solving plan: 1) Read problem carefully. Decide what is given and what is unknown. 2) Assign variables to unknowns. 3) Write equations based on the given facts. 4) Solve the equation and find the numbers. 5) Check results and give the answer. Now reread the problem and assign ... ................
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