1. ©Evergreen Public Schools 2010 1 Solve Equations with Variables on One Side Teacher Notes Still use algebra tiles! Students write and solve equations from word problems.. Supplies Each student needs a bag of algebra tiles. 7/14/11

2. ©Evergreen Public Schools 2010 2 Learning Target Target 3a I can write an equation to solve a problem. What do you think this means? Can you give an example?

3. ©Evergreen Public Schools 2010 3 LaunchLaunch Solve. Remember from last year. 3 x = 6 2 x + 1 = 7 Be prepared to share your work…

4. ©Evergreen Public Schools 2010 4

5. 5 The left side of an equation is equal to the right side.

6. ©Evergreen Public Schools 2010 6 The left side of an equation is equal to the right side.

7. ©Evergreen Public Schools 2010 7 The left side of an equation is equal to the right side. 25¢ =

8. ©Evergreen Public Schools 2010 8 Get a piece of blank paper Fold it in half hamburger style. Use the fold to divide the 2 sides of the equation.

9. ©Evergreen Public Schools 2010 9 Use Algebra Tiles to Solve Cindy, my sister, read two more books than me. She read 5 books. How many did I read? What are you asked to find? Define x: Write an equation to solve the problem.

10. ©Evergreen Public Schools 2010 10 Cindy, my sister, read two more books than me. She read 5 books. How many did I read? Books I read.Books Cindy read.

11. ©Evergreen Public Schools 2010 11 Cindy, my sister, read two more books than me. She read 5 books. How many did I read? Keep it balanced. Do exactly the same to both sides of the equation. Books I read.Books Cindy read.

12. ©Evergreen Public Schools 2010 12 What did I just do? Did I keep it balanced? Cindy, my sister, read two more books than me. She read 5 books. How many did I read? Books I read.Books Cindy read.

13. ©Evergreen Public Schools 2010 13 What is the solution? I read 3 books. Cindy, my sister, read two more books than me. She read 5 books. How many did I read? Books I read.Books Cindy read.

14. ©Evergreen Public Schools 2010 14 I used 3 one-dollar bills when I bought lunch. After lunch, I had 1 one-dollar left in my wallet. How many one-dollar bills did I have before lunch? What are you asked to find? Define x: Write an equation to solve the problem. Use Algebra Tiles to Solve

15. ©Evergreen Public Schools 2010 15 I used 3 one-dollar bills when I bought lunch. After lunch, I had 1 one-dollar left in my wallet. How many one-dollar bills did I have before lunch? How can I get x alone and still keep the equation balanced? Remove zero pairs Before lunchAfter lunch

16. ©Evergreen Public Schools 2010 16 I had $4 before lunch. I used 3 one-dollar bills when I bought lunch. After lunch, I had 1 one-dollar left in my wallet. How many one-dollar bills did I have before lunch? Before lunchAfter lunch

17. ©Evergreen Public Schools 2010 17  Check it: x = 4 x + (-3) = 1 11=  :-)

18. ©Evergreen Public Schools 2010 18 John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? What are you asked to find? Define x: Write an equation to solve the problem. Use Algebra Tiles to Solve

19. ©Evergreen Public Schools 2010 19 John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

20. ©Evergreen Public Schools 2010 20 John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

21. ©Evergreen Public Schools 2010 21 John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

22. ©Evergreen Public Schools 2010 22 John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

23. ©Evergreen Public Schools 2010 23 How can we solve for 1 x ? John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

24. ©Evergreen Public Schools 2010 24 John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

25. ©Evergreen Public Schools 2010 25 John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

26. ©Evergreen Public Schools 2010 26 John buys games for 2 months. = John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

27. ©Evergreen Public Schools 2010 27  Check it: x = 2 3 x + 4 = 10 10 =  :-)

28. ©Evergreen Public Schools 2010 28 Debrief Write what you know about using algebra tiles to solve a problem.

29. ©Evergreen Public Schools 2010 29 5 3 1 2 4 Learning Target Did you hit the target? Target 3a I can write an equation to solve a problem. Rate your understanding of the target from 1 to 5. 5 is a bullseye!

30. ©Evergreen Public Schools 2010 30 Practice Practice 2.5____

31. ©Evergreen Public Schools 2010 31 Solve with algebra tiles. Lizzy bought 4 pens with a $10 bill and got $2 in change. What was the average she spent on each pen? What are you asked to find? Define x: Write an equation to solve the problem.