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Home > AC > Chapter 7 > Lesson 7.1.4 > Problem 7-38

7-38.

Find the point of intersection for each system of linear equations below. Be sure to check your solutions. Which method did you use for each system and why?

  1. Use the Elimination Method.

    Add the equations together vertically.
    The result is:

    Solve for by dividing the equation by .

    Substitute into one of the original equations to find .

    Solve for .

  1. Use the Elimination Method.

    Multiply the 2nd equation by

    Follow the steps outlined in part (a).

  1. Try rewriting the 2nd equation. What do you notice?