1. Solving One-Step Equations

3. Word List variable term expression coefficient equation algebra

4. Types of Equations Addition x + 5 = 15 Subtractionn – 3 = 7 Multiplication2x = 14 Divisionn = 6 5

5. Inverse Operations To solve equations we use inverse operations. OperationInverse AdditionSubtraction Addition MultiplicationDivision Multiplication

6. Solving addition equations

7. What type of equation is this? What inverse operation should you use?

8. Subtract 3 from both sides of the equation

9. Solving subtraction equations

10. What type of equation is this? What inverse operation should you use?

11. Add 8 to both sides of the equation x = 20

12. Practice Problems 1) m – 4 = 9 2) 12 = s – 3 3) x – 7 = 21 4) 15 = r - 5

13. Model magic

15. x +++ +++++ ++ x =

16. x ++ +++ + ++

17. USE EACH KEY TO WRITE THE EQUATION REPRESENTED BY EACH PICTURE. THEN, SOLVE EACH EQUATION What equation is modeled?

18. Example:

23. Four in a Row FIND THE EQUATION BEING MODELED