HS.A.20.a
Understand a system of two equations in two variables has the same solution as a new system formed by replacing one of the original equations with an equivalent equation.
Example Problems
Do the following equations have the same solution?
Do the following equations have the same solution?
What is the result of adding these two equations?
Khan Academy ResourcesEquivalent systems of equations reviewElimination method review (systems of linear equations)Systems of equations with eliminationSystems of equations with elimination challengeSystems of equations word problems (with zero and infinite solutions)Reasoning with systems of equationsSystems of equations with elimination: x-4y=-18 & -x+3y=11Systems of equations with elimination: King's cupcakesSystems of equations with elimination: potato chipsSystems of equations with elimination: TV & DVDWhy can we subtract one equation from the other in a system of equations?Reasoning with systems of equationsWorked example: equivalent systems of equationsWorked example: non-equivalent systems of equationsSystems of equations with elimination: coffee and croissantsSystems of equations with elimination: apples and oranges
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