3.2 Elimination Method

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.