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Lesson

Systems of Equations. Elimination

5 hours ago by

tsalter_815070

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- Slide 2Report an issue
- Question 330 secondsReport an issueQ.
I can combine 2 linear equations if the coefficients are not opposites.

answer choices - Question 4120 secondsReport an issueQ.
Solve by elimination:

3x+7y=23

-3x-7y=-17

answer choices - Question 5120 secondsReport an issueQ.
Solve using elimination.

4x + 8y = 20

-4x + 2y = -30

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- Question 8Ungraded30 secondsReport an issueQ.
For the following equations, which coefficients would be easier to make opposites?

2x + 3y = 12

4x - 7y = - 54

no correct answer - Question 930 secondsReport an issueQ.
Let's multiply the top equation by -2. What would be our new equation?

2x + 3y = 12

4x - 7y = - 54

answer choices - Question 1030 secondsReport an issueQ.
Now, our equations will look like this

-4x - 6y = -24

4x - 7y = - 54

Let's

(add) these 2 equations to__combine__the x variable. What would our combined equations be?__ELIMINATE__answer choices - Question 1130 secondsReport an issueQ.
Let's solve for y.

-13y = -78

answer choices - Question 1230 secondsReport an issueQ.
Now, let's find the solution to the system.

2x + 3y = 12

4x - 7y = - 54

answer choices - Question 13900 secondsReport an issueQ.
Your Turn:

Solve by elimination

2x + 9y = -7

6x - 3y = 9

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