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Home > CC3 > Chapter 3 > Lesson 3.1.2 > Problem 3-14

3-14.

tiles key Write the equation represented in each diagram below on your paper. For each part, simplify as much as possible and then solve for . Be sure to record your work on your paper. Explore using the 3-14a HW eTool (CPM) and 3-14b HW eTool (CPM) Homework Help ✎

  1. expression mat

    Write the original equation.

    Flip subtraction to addition.

    Remove zero pairs.

    Combine like terms.

    Remove an -tile from both sides.

    Add to both sides.

    Divide by on both sides.

  1. expression mat

    Follow steps similar to part (a).

Use the eTools below to help solve the problems.
Click the link at right for the full version of the eTool: CC3 3-14a HW eTool

Click the link at right for the full version of the eTool: CC3 3-14b HW eTool