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Home > CCA > Chapter 4 > Lesson 4.3.1 > Problem 4-111

4-111.

Solve the systems of equations below using the method of your choice. Check your solutions, if possible. Homework Help ✎

The Substitution Method can be used to solve both of these systems.


  • Substitute '7 − 2x' for y in '2x + y = 10.'

  • 2x + (7 − 2x) = 10

  • Solve for x. What do you notice about this system?

  • 7 ≠ 10


  • Follow the steps in part (a), but substitute
    '3y − 1' for x in '4x − 2y = 10.'