Systems OF EQUATIONS Elimination.

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Presentation transcript:

Systems OF EQUATIONS Elimination

WARM UP Simplify: 6(4x – 2) = 4x + 20 Solve for y: 3x – 9y = 12. Draw a line to represent this equation. How many solutions does this system have? y = 3x + 5 and y = 3x + 5 Solve this system using substitution: y = 2x and y = 4x + 12

How do you think you can solve without using graphing or substitution? Can you eliminate a variable if you add the two equations?

Try a few on your own

What’s different about the systems of equations below? Can one variable be eliminated? Can multiplication be used? How could I eliminate x using multiplication first? How should I decide which variable to eliminate in which equation?

Try these with the person sitting next to you.

Which method would you use to solve the system of equations. Why Which method would you use to solve the system of equations? Why? (substitution, elimination, graphing) 3. 1. 2.

Exit Ticket 1. 2. 3.

Homework Complete problems #13-24 using elimination. You can copy all the problems or look on my weebly for this presentation. #19-24 is on the next slide.

Homework