### Home > GB8I > Chapter 7 Unit 8 > Lesson INT1: 7.1.1 > Problem 7-11

7-11.

Solve the systems of equations below.

Read the Math Notes box in Lesson 6.2.3 to review the Substitution Method. Use it to solve both parts.

To start part (a) substitute

in for into the second equation. So . Solve for

.Once you solve for

, substitute that value in forinto one of the original equations:or.

Solve for.Put the answer in point form

.

The final answer is.

Substitute (

) in forin the second equation. Follow steps

and from part (a). Read the Math Notes box in Lesson 6.4.1 to review the different types of solutions for systems of equations.