### Home > CCAA8 > Chapter 7 Unit 8 > Lesson CCA: 7.1.3 > Problem 7-40

7-40.

Solve the following systems of equations.

If you need a reminder of how to solve systems of equations, refer to the Math Notes boxes in Lessons 4.2.2 and 5.1.1.Which system above is most efficiently solved by using the Substitution Method? Explain.

Which system above is most efficiently solved by using the Substitution Method? Explain.

Which system above is most efficiently solved by using the Elimination Method? Explain.