Unit 6 Day 4 Elimination Method

Unit 6 (Day 4) Notes ­ Elimination Same Coef.notebook

5

October 27, 2021

Solve the system by elimination.

Unit 6 (Day 4) Notes ­ Completed.notebook

4

October 27, 2021

Jan 21­7:08 PM

Solve the system by elimination.

Unit 6 (Day 4) Notes ­ Completed.notebook

5

October 27, 2021

Solve the system by elimination.

Unit 6 (Day 4) Notes ­ Completed.notebook

6

October 27, 2021

Jan 21­7:18 PM

Solve the system by elimination.

Multiple Choice

What variable should you eliminate for the following?

x - y = 11

2x + y = 19

• y
• 11
• 2x
• x

Multiple Choice

What variable should you eliminate for the following?

3x - y = 14

-3x + 4y = 21

• y
• 4y

• 14

• x

Multiple Choice

What step needs to be done first before we can use elimination?

7x - y = 269

7x + 3y = 420

• Multiply the top equation by -1.

• Subtract the second equation from the first.
• Multiply both equations by 2.
• Add the equations together.

Multiple Choice

After we multiplied the top equation by -1, what variable would we cancel?

-1 [7x - y = 269]

7x + 3y = 420

• x

• y

• 3y

• 420

Multiple Choice

-4x - 2y = -12

4x + 8y = -24

• (2, -4)
• (0, 3)
• (6, -6)
• (-1, 1)

Multiple Choice

x - y = 11

2x + y = 19

• (10,-1)

• (5,6)

• Infinitely Many Solutions

• No Solution

• (-1, 10)

​ 0 = 11? 3=3

Unit 6 (Day 4) Notes ­ Completed.notebook

8

October 27, 2021

Jan 21­7:08 PM

Solve the system by elimination.

Unit 6 (Day 4) Notes ­ Completed.notebook

9

October 27, 2021

Jan 21­7:08 PM

Solve the system by elimination.

Multiple Choice

-14x - 272y = 99

14x + 272y = 123

• One solution
• Infinite solutions
• No solution
• x = 0, y = 0

Multiple Choice

9x - 12y = -9

-9x + 12y = 9

• One solution
• Infinite solutions
• No solution
• x = 4, y = 3