This lesson teaches how to use systems of equations to solve word problems that require finding two unknowns. By defining two variables and writing two equations to comprise a system of equations, one can solve for the values of the variables using either the substitution or addition method. The focus of this lesson is on how to set up a system of equations and how to check the answer, with the goal of finding the cost of each item or the values of two unknown numbers.
Setting up systems of equations to solve word problems.
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