3-5 Practice Form K Answers

  1. (7, 4, -5)
  2. (2, 1, 4)
  3. (1, 5, 7)
  4. (2, 0, -6)
  5. 12 pennies, 3 nickels, 2 dimes
  6. Substitute into each equation; if all equations are true, the values represent a solution