CPM Homework Banner

Home > CCA > Chapter 1 > Lesson 1.1.3 > Problem 1-28

1-28.

 Solve the equations below for x and check your solutions.  Homework Help ✎

  1.  

    Add 3 to both sides.

    −3 + 2x = −x + 6
    +3 +3
    2x = −x + 9

    Add x to both sides.

    2x = −x + 9
    +x +x
    3x = 9

    Divide both sides by 3.

    x = 3

    Substitute 3 back into the original equation.
    − 3 + 2(3) = −(3) + 6
    −3 + 6 = −3 + 6
    −3 = −3

    It works!

  2. Refer to part (a).

    x = 1

  3. x = −1.5

  4. Use the same method as parts (a), (b), and (c). Make sure to check your answer as shown in part (a).