## Math 6A, Lesson 5, Spring 2017, 3/19/2017

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Math 6A, Lesson 5, Spring 2017, 3/19/2017

1. We continue working on how to construct/form linear equations to solve word 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 concept 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:

• Looking ahead: pop quiz next week on equations
• Show detailed steps for all HW problems
• Handout two pages
• Fun and challenge: Two pages are suggested. See email sent to parents to order the Math Contest books:

Math Contests, Grades 7 & 8 (and Algebra Course 1) Vol. 6

https://www.amazon.com/gp/product/0940805197/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Math Contests, Grades 4, 5 & 6, Vol. 6 (School Years 2006-2007 Through 2010-2011)

https://www.amazon.com/gp/product/0940805189/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1