3.3 Substitution Method

Presentation

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Mathematics

•

9th - 12th Grade

•

Medium

•

CCSS

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

Standards-aligned

Miriam Giron

Used 13+ times

FREE Resource

3 Slides • 6 Questions

3.3 Substitution Method

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

Steps for Substitution Method:

Step 1: Solve one of the equations for either x = or y = .

Step 2: Substitute the solution from step 1 into the second equation.

Step 3: Solve this new equation.

Step 4: Solve for the second variable

Multiple Choice

The solution (x, y) to a system of equations is the point where they...?

Run off the graph

Don't touch

Intersect

Exist

Multiple Choice

What is the solution?

(1, -1)

(-1, 1)

(0, -2)

(0, 1)

Multiple Choice

Solve the system by elimination.

−4x − 4y = 0

4x + 4y = 0

(−6, −4)

Infinite number of solutions

No Solution

(6, 4)

(0,0)

Video for 3.3 Substitution Method

Video 1:

https://www.youtube.com/watch?v=xzuouSZ69XU

Video 2:

https://www.youtube.com/watch?v=-mZZ6iPwQpE&t=8s

Multiple Choice

The first step in solving using the substitution method is __________.

get x by itself

get y by itself

get either variable by itself in one equation

add the equations together

Multiple Choice

Solve the system using substitution method.

y = -6

-3x - 6y = 24

(6, 6)

(6, -6)

(4, -6)

(-6, 4)

Multiple Choice

Solve the following system using substitution:

y=-3x+5

5x-4y=-3

$\left(1,\ 2\right)$

$\left(1,\ 5\right)$

$\left(2,\ 5\right)$

$\left(5,\ 1\right)$

3.3 Substitution Method

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

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