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On your paper, write the equation represented at right. Simplify as much as possible and then solve for .   

A 4 region equation mat with tiles as follows: Positive left: 1 positive x, 1 positive unit, 2 negative units. Negative left: 3 positive units and 1 negative x. Lower right: 1 positive unit and 1 negative unit.Shaded tile is plus 1.  Tile is negative 1.

For more help with this problem, see problem 3-14.

Use the eTool below to help solve the problem.
Click the link to the right for full version.  3-25 HW eTool