### Home > CCA > Chapter 7 > Lesson 7.1.3 > Problem 7-40

7-40.

Solve the following systems of equations. Homework Help ✎

3

*x*− 2*y =*14

−2*x*+ 2*y*= − 10*y*= 5*x*+ 3

−2*x*− 4*y*= 10Which 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.

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.