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Solving the troll riddle visually
Solving the system of equations visually. Now we can save the prince/princess
Trolls, tolls, and systems of equations
A troll forces us to use algebra to figure out the make-up of his currency. We end up setting up a system of equations
Systems with elimination practice
Example of solving systems of equations with elimination
Simple elimination practice
Practice solving systems of equations through simple elimination (exercise at http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_with_elimination_0.5 )
How many bags of potato chips do people eat?
Using elimination to solve a system of equations
King's cupcakes: Solving systems by elimination
Using simple elimination to figure out how many cupcakes are eaten by children and adults
Solving systems graphically
Some practice solving systems graphically (exercises available at http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/graphing_systems_of_equations )
Practice using substitution for systems
Example doing Khan Academy systems of equations exercise at: http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_with_substitution
