Copy of Open Middle: Systems of Linear Equations (4)

Using the digits -9 to 9 no more than one time each, fill in the blanks to make a true statement. (The point that will eventually appear on the graph is moveable.)
Algebraically show why your setup above is valid. That is, show how your setup makes both equations true.
Create another setup that is entirely different from the one you created above. (Be sure not to repeat digits!)
Algebraically show why your setup above is valid. That is, show how your setup makes both equations true.
– Elena Medina, Tim Brzezinski

Information: Copy of Open Middle: Systems of Linear Equations (4)