Objective the student will be able to
This presentation is the property of its rightful owner.
Sponsored Links
1 / 12

Objective The student will be able to: PowerPoint PPT Presentation


  • 42 Views
  • Uploaded on
  • Presentation posted in: General

Objective The student will be able to:. solve equations using addition and subtraction. Designed by Skip Tyler, Varina High School. r + 16. =. -7. 1) Solve r + 16 = -7. Think of this equation as a balance scale. Whatever you do to one side has to be done to the other to keep it balanced!.

Download Presentation

Objective The student will be able to:

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Objective the student will be able to

ObjectiveThe student will be able to:

solve equations using addition and subtraction.

Designed by Skip Tyler, Varina High School


1 solve r 16 7

r + 16

=

-7

1) Solve r + 16 = -7

Think of this equation as a balance scale.

Whatever you do to one side has to be done to the other to keep it balanced!


1 solve r 16 71

1) Solve r + 16 = -7

To solve, you must get the variable by itself.

What number is on the same side as r?

16

To get r by itself, we must undo the “add 16”. What is the opposite of addition?

Subtract 16


1 solve r 16 72

1) Solve r + 16 = -7

- 16 -16

r = -23

-23 + 16 = -7

  • Draw “the river” to separate the equation into 2 sides

  • Subtract 16 from both sides

  • Simplify vertically

  • Check your answer by substituting your answer back into the problem


2 solve x 2 3 get the variable by itself what is your first step

Answer Now

2) Solve x + 2 = -3Get the variable by itself. What is your first step?

  • Add 2 to both sides

  • Subtract 2 from both sides

  • Add 3 to both sides

  • Subtract 3 from both sides


2 solve x 2 3

2) Solve x + 2 = -3

- 2 - 2

x = -5

-5 + 2 = -3

  • Draw “the river” to separate the equation into 2 sides

  • Subtract 2 from both sides

  • Simplify vertically

  • Check your answer by substituting your answer back into the problem

On homework and tests, be sure to check your work!!

There is no reason why you should miss a problem!


3 solve 8 m 3

Answer Now

3) Solve 8 = m - 3

  • m = 5

  • m = 11

  • m = 24

  • m = 8/3


3 solve 8 m 31

3) Solve 8 = m - 3

+ 3+ 3

11= m

8 = 11 - 3

  • Draw “the river” to separate the equation into 2 sides

  • Add 3 to both sides

  • Simplify vertically

  • Check your answer by substituting your answer back into the problem


When solving equations we want to eliminate double signs

When solving equations, we want to eliminate double signs.

y + (-3) = 8

is rewritten as

y – 3 = 8

p – (-5) = 6

is rewritten as

p + 5 = 6

As a general rule, replace “+ (- )” with “–” and “– (- )” with “+”. This will make things less confusing in the future!


4 solve y 3 7

4) Solve y + (-3) = 7

y – 3 = 7

+ 3 +3

y = 10

10 + (-3) = 7

  • Draw “the river” to separate the equation into 2 sides

  • Eliminate the double sign

  • Add 3 to both sides

  • Simplify vertically

  • Check your answer by substituting your answer back into the problem


5 solve x 2 1

  • Draw “the river” to separate the equation into 2 sides

  • Eliminate the double sign

  • Subtract 2 from both sides

  • Simplify vertically

  • We haven’t gotten x by itself. If we read this aloud, it is “the opposite of x equals -1”. What would x be equal?

  • Check your answer

-x + 2 = 1

- 2 - 2

-x = -1

x = 1

-(1) + 2 = 1

5) Solve. -x - (-2) = 1


Solve y 3 7

Answer Now

Solve -y – (-3) = 7

  • y = 10

  • y = 4

  • y = -10

  • y = -4


  • Login