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3-40.

Translate the Equation Mat at right into an equation. Do not simplify your equation. Remember that the double line represents “equals.” Homework Help ✎

Count up the number of each type of tile in each section, keeping track of the tiles' signs and whether they're being added or subtracted.

Obtain an equation mat with four sections from your teacher. Upper left: Add 2 positive unit tiles and 2 negative x tiles. Bottom left: Add 4 positive unit tiles and 1 negative x tile. Upper right: Add 3 negative unit tiles and 2 positive unit tiles. Bottom right: Add 2 negative unit tiles and 1 positive x tile.