1. ALGEBRA
Lesson #31

2. Equations We must find the missing value in a mathematical statement.
Find the unknown (variable = letter )
An equation may be solved using trial and error
Some equations can be solved using inverse-operation method.

3. Inverse Operation method:
Ex: (you do the opposite order of BEDMAS)
7n – 2 = 110
7n =
7n = 112
n = 112 ÷ 7
n = 16
Go backwards to double-check
7(16) – 2 =

4. 3x – 0.5 = 0

5. 4 – 2p = -10

6. What is the rank if the term is 15 in this rule: t = 2n + 3
The term 15 is the 6th term. Rank = 6

7. What is the rank if the term is = 34
What is n if t=34?
t = 3n + 4

8. Solve:
36 = 4n + 20