1. 8.1 pt 1 Solving equations with addition/subtraction
Objective: students will learn how to solve one step equations by addition or subtraction.

2. Definitions Inverse operation: equation that undoes itself.
x – 5 = 23
Add 5 to undo your subtract 5
Equivalent Equations: both sides of equation equal.
Need to find All Solutions to problems.

3. Solve equations w/subtraction
HINT: do to one side, you do to the other.
X + 2 = 19
-7 = y + 14
X + 1 = 8
3 + x = 41

4. Student Problems x + 30 = -24 -2 = z + 7 X + 7 = 10 20 = g + 39

5. Solve equation by addition
c – 29 = 30

6. Student Problems n – 6 = -19 a – 14 = 8 b – 30 = -70 p – 24 = -53
X - 65 = 89

7. Word Problems
You bought a cd player for $100 after a $20 mail in rebate. Find the price of the cd player before the rebate.
Know:

8. Student Example
Alexis was holding a cat. Alexis steps on a scale and the scale reads 172 lbs. Alexis weighs 90lbs. Find the weight of the cat.
Know:

9. Wrap-up
Questions/Comments
Hw: worksheet