3.2 Elimination Method

Presentation

•

Mathematics

•

9th - 12th Grade

•

Medium

•

CCSS

8.EE.C.8B, HSA.REI.C.6

Standards-aligned

Miriam Giron

Used 54+ times

FREE Resource

5 Slides • 4 Questions

3.2 Elimination Method

Objective: Students will solve systems of equations by using elimination method at 70%.

Multiple Choice

The solution (answer) to a system of equations is ____________

the point where the 2 lines intersect

the graph of a line

only finding what x = __

Definition:

Elimination Method is the process of eliminating one of the variables in a system of equations using addition or subtraction in conjunction with multiplication or division and solving the system of equations.

Steps for elimination method :

Step 1: Align your variables
Step 2: Identify variables with equal and opposite coefficients (example: -2x and 2x)
Step 3: Add/ subtract equations (vertically)
Step 4: Solve for the other variable

Video of Lesson

https://www.youtube.com/watch?v=ZOilSK7dKag&t=14s

Multiple Choice

what is the variable that willl be "eliminated"?

5x - 4y = 11

5x + 4y = -14

x variable

y variables

both variables

Multiple Choice

2x - 6y = 20

2x + 5y = -11

what would the top equation become when you multiply everything by -1?

2x - 6y = 20

-2x - 6y = -20

-2x + 6y = 20

-2x + 6y = -20

Multiple Choice

what is the resulting combined equation to the following system:

5x - 4y = 11

5x + 4y = -14

5x = -3

10y = -3

10x = -3

10x = -25

Reminder:

If you have not completed the Math Diagnostic Test this is your chance to do it. It is only available

Monday- Thursday during school hours.

No Assignment today.

3.2 Elimination Method

Objective: Students will solve systems of equations by using elimination method at 70%.

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