Math 6A, Lesson 4, Spring 2017, 3/12/2017

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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