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9-20.

Solve the following systems of equations algebraically. Then graph each system to confirm your solution.  

  1.  

  • Replace with .

  • Solve for .

  • Solve for .

  1.  

  • Replace with .

  • Solve for .

  • Solve for .

In the eTool below type points into the tables to explore where the two graphs intersect.
Click on the link at right to access the Desmos calculator: Graphing Calculator (Desmos)