1. 8.2 2 step equations
Objective: students will use what they learned with one step equations and be able to solve a two step equation.

2. Information To Solve 2-step equation. Ex: 2x + 5 = 6
Isolate variable (addition/subtract)
Solve for variable (multiply/divide)
Ex: 2x + 5 = 6
Note: can’t have negative variable.
Ex: -x = 3; need to multiply by -1
x = -3

3. Examples
4x + 1 = 5
2r - 9 = 1
3n + 8 = 2
12k - 17 = 31

4. Examples
12 – 4s = -12
-2m + 6 = 8
-2q – 63 = 47
18 – r = 42

5. Examples
b/4 – 8 = 1
d/5 - 1 = 2
c/6 – 2 = 6
h/ = -10

6. Examples
x/3 + 2 = -1
h/4 + 7 = 23
y/ = 21
j/ = -40

7. Word Problems
Train has 50 cars and one locomotive. Locomotive weighs 125 tons and each car weighs same. Total weight is 4725 tons. Find weight of one car.
Know: 50 cars, locomotive 125 tons,
total is 4725 tons.

8. Word Problems
You buy a drum set for $495. You put a down payment of $150 and make three equal payments. Write an equation and find the cost of each payment.
Know: costs $495
down pay: $150
make 3 payments

9. Wrap-up
Questions/Comments
Hw: workbook 47