1. Algebra 2 Monday, October 20, 2014
Complete Warm-ups Slide (see page 2 of this packet)
Check in and discuss A#3.21 page 127 #1-4; 12-17; 24; 25
Discussion/Notes/Guided Practice
Section 3.2 Part 2: Solve Systems by Elimination
Homework:
A#3.22 page 127 #6-11; 18-23
MUST see original equations and ALL work in order to receive credit

2. Solve a linear system of equations using the Elimination Method Q&A
After this section, you will be able to:
Success Criteria:
Solve a linear system of equations using the Elimination Method
Q&A
Guided Practice
Homework

3. Warm ups:
Solve the following systems by Graphing:

4. Warm ups:
Solve the following systems using Substitution: 1. 2𝑥−𝑦=9 2. 2𝑥+2𝑦=4 𝑥+3𝑦=−6 𝑥−2𝑦=0

5. Elimination Method
Using this method, you eliminate one of the variables by adding or subtracting the equations.
Note: when you add two true equations, the result is a new equation that is also true!

7. Guided Practice #1: Solve Using Elimination

8. b. 2𝑥−𝑦=7 3𝑥+𝑦=8

9. Example 2: Solve by Elimination (Multiply one equation first)
2𝑥−4𝑦=−26 3𝑥−𝑦=−24

10. Guided Practice #2: Solve Using Elimination
a. 3𝑥−𝑦=12 5𝑥+2𝑦= b. 4𝑥−𝑦=6 2𝑥− 𝑦 2 =4

11. Example 3: Solve by Elimination (Multiply both equations first)
3𝑥−2𝑦= 𝑥+3𝑦=−25

12. Guided Practice #3: Solve Using Elimination
a. 7𝑥+2𝑦=−1 4𝑥−3𝑦=− b. 5𝑥+4𝑦=12 7𝑥−6𝑦=40

13. A#3.22 page 127 #6-11; 18-23