1. Pre-Algebra
Lesson 5.5
Equations with Mixed Operations

3. Go to this site:
http://www.add2nb.com/
Equations with Mixed Operations

4. Solve for x:
3x + 5 = 23
To solve the equation above, what steps should
be done?
First step
Second Step

5. P
E
MD
AS
SA
DM
E
P

6. PEMDAS
vs.
SADMEP
Simplify
Solve
Expressions
Equations
Example:
(3 + 4) 3
2
x
3
Example:
- 5 = -6

7. Solve = get it by itself

8. Steps to solving equations:
1. Combine like terms on each side of the
equal sign.
2. Move terms to the correct side by using
SADMEP
3. Simplify using Inverse Operations

9. Solve:
x
3
- 10 = -2
1. combine
2. move
3. Simplify

10. Solve:
3n = 64 - 5n
1. combine
2. move
3. Simplify

11. Solve:
9 + 5x - 3x = 10 + 13
1. combine
2. move
3. Simplify