lesson 2 - solving equations using inverse...

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Lesson 2 Solving Equations Using Inverse Operations Multiple Variables.notebook April 18, 2015 Outcome 1. Model and solve problems, using linear equaons of the form where a, b, c, d, e and f are raonal numbers: ax = b = b, a ≠0 ax + b = c + b = c, a ≠0 ax = b + cx a(x + b) = c ax + b = cx + d a(bx + c) = d(ex + f) = b, x ≠0 2. Explain and illustrate strategies to solve single variable linear inequalies with raonal coefficients within a problem‐solving context.

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Page 1: Lesson 2 - Solving Equations Using Inverse …msnielsencoursessite.weebly.com/uploads/1/3/5/8/13589317/...Lesson 2 Solving Equations Using Inverse Operations Multiple Variables.notebookApril

Lesson 2 ­ Solving Equations Using Inverse Operations Multiple Variables.notebookApril 18, 2015

Outcome1. Model and solve problems, using linear equaons of the form where a, b, c, d, e and f are raonal numbers:

• ax = b 

•  = b, a ≠ 0

• ax + b = c 

•  + b = c, a ≠ 0

• ax = b + cx 

• a(x + b) = c

• ax + b = cx + d

• a(bx + c) = d(ex + f)

•  = b, x ≠ 0

        2. Explain and illustrate strategies to solve single variable linear inequalies with raonal coefficients within a problem‐solving context.

Page 2: Lesson 2 - Solving Equations Using Inverse …msnielsencoursessite.weebly.com/uploads/1/3/5/8/13589317/...Lesson 2 Solving Equations Using Inverse Operations Multiple Variables.notebookApril

Lesson 2 ­ Solving Equations Using Inverse Operations Multiple Variables.notebookApril 18, 2015

Part 2 ­ Multiple Variables

Some Pre­Algebra Help

Page 3: Lesson 2 - Solving Equations Using Inverse …msnielsencoursessite.weebly.com/uploads/1/3/5/8/13589317/...Lesson 2 Solving Equations Using Inverse Operations Multiple Variables.notebookApril

Lesson 2 ­ Solving Equations Using Inverse Operations Multiple Variables.notebookApril 18, 2015

Strategies:

"Drawing the Line" / Algebraic

45 = 5x

45/5 = 5x/5

9=x

"Unwrapping a Present"/ Illustrating Steps

Review Your Skills!

Write your Responses and group with your Worksheets

Complete Worksheet Booklets and hand in for Formative Marks on Power School

Page 4: Lesson 2 - Solving Equations Using Inverse …msnielsencoursessite.weebly.com/uploads/1/3/5/8/13589317/...Lesson 2 Solving Equations Using Inverse Operations Multiple Variables.notebookApril

Lesson 2 ­ Solving Equations Using Inverse Operations Multiple Variables.notebookApril 18, 2015

Solving Equations for unknows...

3n + 6 = 3Working Concretely 

1) What side is the unknown on?

2) What numbers are on that side?

3) Get rid of the number farthest from the unknown first (do the opposite)

4) Remove the remaining numbers, working closer to the unknown each time

Working with multiple variablesSimplify: Group all like terms on the same side of

the equal sign first.

6 ­ 2m + 7 + 4m = 12

Page 5: Lesson 2 - Solving Equations Using Inverse …msnielsencoursessite.weebly.com/uploads/1/3/5/8/13589317/...Lesson 2 Solving Equations Using Inverse Operations Multiple Variables.notebookApril

Lesson 2 ­ Solving Equations Using Inverse Operations Multiple Variables.notebookApril 18, 2015

Working With Brackets

Expand first, then simplify

5(x ­ 7) = ­15

Examples

2(m + 4) = 11 ­3(t ­ 2.7) = 1.8

7.6 = ­2( ­3 ­ y) 8.4 = ­6(a + 2.4)

Page 6: Lesson 2 - Solving Equations Using Inverse …msnielsencoursessite.weebly.com/uploads/1/3/5/8/13589317/...Lesson 2 Solving Equations Using Inverse Operations Multiple Variables.notebookApril

Lesson 2 ­ Solving Equations Using Inverse Operations Multiple Variables.notebookApril 18, 2015

Examples

a) 4(g + 5) = ­15 b)3(4j + 5) = ­20

c) 2.2(h ­ 5.3) = ­6.58  d) 0.04(5 ­ s) = 0.3

What mistakes did the student make?

Write a correct solution for each equation

Page 7: Lesson 2 - Solving Equations Using Inverse …msnielsencoursessite.weebly.com/uploads/1/3/5/8/13589317/...Lesson 2 Solving Equations Using Inverse Operations Multiple Variables.notebookApril

Lesson 2 ­ Solving Equations Using Inverse Operations Multiple Variables.notebookApril 18, 2015

Practice Your Skills

Complete Worksheet Booklet