Select an appropriate method to solve a system of two linear equations in two variables.

A1.10.aSolve a system of two equations in two variables by using linear combinations; contrast situations in which use of linear combinations is more efficient with those in which substitution is more efficient.A1.10.bContrast solutions to a system of two linear equations in two variables produced by algebraic methods with graphical and tabular methods.
Khan Academy Resources
Equivalent systems of equations reviewElimination method review (systems of linear equations)Systems of equations with eliminationSystems of equations with elimination challengeSolving equations graphically: introInterpret points relative to a systemElimination strategiesCreating systems in contextSystems of equations word problems (with zero and infinite solutions)Reasoning with systems of equationsSolving equations graphically: word problemsSolving equations graphically: graphing calculatorCombining 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 substitution: potato chipsSystems of equations with elimination (and manipulation)Systems of equations with elimination: TV & DVDSolutions to systems of equations: consistent vs. inconsistentWhy can we subtract one equation from the other in a system of equations?Intro to linear equation standard formSolving equations by graphing: word problemsReasoning with systems of equationsWorked example: equivalent systems of equationsWorked example: non-equivalent systems of equationsInterpreting points in context of graphs of systemsSolving equations by graphingSystems of equations with elimination: coffee and croissantsTwo-variable linear equations introElimination strategiesSolving equations by graphing: introIntro to point-slope formSystems of equations with elimination: apples and orangesSolving equations by graphing: graphing calculator
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