Math 6A, Lesson 4, Spring 2017, 3/12/2017
1. Constructing/Forming Linear Equations to Solve Problems
The steps involved in problem solving with linear equations are:
- Step 1. Read the question carefully and identify the unknown quantity
- Step 2. Use a letter to represent the unknown quantity (e.g. x)
- Step 3. Express other quantities in terms of x
- Step 4. Construct/Form an equation based on the given information
- Step 5. Solve the equation
- Step 6. Write down the answer statement
2. Review basic concert of “open parenthesis”
- 2(3x+y) – 5(0.2x-0.6y) =
- -2(3x+y) + 5(0.2x-0.6y) =
- -2(3x-y) + 5(-0.2x-0.6y) =
- 2(3x-y) – 5(0.2x+0.6y) =
3. Home Work:
- Show detailed steps for all HW problems
- Handout one page
- page 31: 23, 25
- Fun and challenge: one page each: 6th and 7th grade MATH CONTESTS problems