### Home > GB8I > Chapter 9 Unit 10 > Lesson INT1: 9.1.3 > Problem 9-35

9-35.

Solve the following systems of equations.

For part (a) consider adding the two equations together to eliminate the variable *y*.

For part (b) consider substituting the first equation into the second equation.

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.