A.REI.6b

(9/10) Solve systems of two linear equations in two variables algebraically, and estimate solutions by graphing the equations. Solve simple cases by inspection. For example, 3x + 2y = 5 and 3x + 2y = 6 have no solution because 3x + 2y cannot simultaneously be 5 and 6.

Khan Academy Resources

Equivalent 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 substitution: 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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