Warm Up. Lesson 63: Solving Systems of Linear Equations by Elimination Expressions and Equations.

Warm Up

1. The graph of a _________________ equation is a straight

line.

2. Simplify

3. Simplify

4. Simplify

5. Simplify

Lesson 63: Solving Systems of Linear Equations by EliminationExpressions and Equations

Elimination• Sometimes it’s not practical to use substitution to solve a

system of equations (recall practice d from Lesson 59)

• Sometimes it’s easier to eliminate one of the variables by combining the two equations using addition or subtraction.

ExampleSolve by elimination:

ExampleSolve by elimination:

ExampleSolve by elimination:

ExampleA movie theater sells 540 tickets to a matinee showing of a new animated feature. A child matinee ticket costs $5.50 and an adult matinee ticket costs $6.00. If the movie theater made $3060 for that showing, how many adult tickets were sold?

Homework Questions

Homework Questions

Correcting Homework• Be kind.

• If the paper in front of you has no work shown, return it to its owner.

• If the paper in front of you is not in pencil or black ink, return it to its owner.

• If the paper in front of you is not complete, return it to its owner.

• Remember you are filling out the score sheet for the person that you are correcting.

• Be sure to write “C.B. ____________” with your name on the paper you graded and on the score sheet.

Homework• 1st and 2nd hour: Lesson 63 #4-7, 11-13, 16-18, 21-23, 25, 27-

28, 30, Practice a-e

• 3rd hour: 7, 11-13, 16-18, 27-28, 30, Practice a-e