1 / 8

Warm-up Wednesday/Thursday October 29/30

Warm-up Wednesday/Thursday October 29/30. Solve 2 x + y = 9 3 x – y = 16. Homework Questions??. So Substitution is my personal least favorite method of solving systems of equations. Some like it, some don’t. I am one that prefers another route. There is another way!! Elimination!!.

miranda-tyler
Télécharger la présentation

Warm-up Wednesday/Thursday October 29/30

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Warm-up Wednesday/Thursday October 29/30 Solve 2x + y = 93x – y = 16

  2. Homework Questions?? So Substitution is my personal least favorite method of solving systems of equations. Some like it, some don’t. I am one that prefers another route.

  3. There is another way!! Elimination!! Let’s rework the warm-up using elimination just so we can see that it will work as well. 2x + y = 93x – y = 16 Then substitute x=5 into the other equation 5x      = 25 2(5) + y = 9  10 + y = 9y = –1 So x=5 Then the solution is (x, y) = (5, –1)

  4. ADD!!!!!!!

  5. Solvebyelimination x – 2y = –9x + 3y = 16 In order to eliminate these, you must use SUBTRACTION but don’t forget to subtract EVERYTHING! x – 2y = -9 - (x + 3y = 16) -5y = -25 y = 5 x – 2(5) = –9x – 10 = –9x = 1 Then sustitute y=5 back into the other equation Then the solution is (x, y) = (1, 5)

  6. Multiply!!!!!!

  7. Solvebyelimination 4x – 3y = 25–3x + 8y = 10 In order to eliminate, you first have to MULTIPLY! Plug it back into the other equation y = 5 4x – 3(5) = 254x – 15 = 254x = 40x = 10 So the answer is (10, 5)

  8. Classwork/Homework Worksheet on Elimination

More Related