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12-28.
  1. Solve the system of equations below. What subproblems did you need to solve? Homework Help ✎

  2. x + 2y = 4
    2xy = −7
    x + y + z = −4

Use the first two equations to solve for x and y using the Elimination Method.

−2(x + 2y) = −2(4)

2xy = −7

Now that you know x and y, how can you find z?

x = −2, y = 3, z = −5