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Home > CCA > Chapter 4 > Lesson 4.2.5 > Problem 4-81


Solve the following systems of equations using any method. Check each solution, if possible. Homework Help ✎

  1. Use the Elimination Method.

    Find then input the answer into one of the equations above to find .

  1. Use the Substitution Method. The equivalent of is already given.


  • Refer to parts (a) and (b) for help. Be aware of the in the first equation.

  • Use the elimination method like in part (a).

    Multiply the first equation by .