Objective
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solve literal equations (formulas) for a specified variable. SOL: A.1 PowerPoint PPT Presentation


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Objective The student will be able to:. solve literal equations (formulas) for a specified variable. SOL: A.1. Designed by Skip Tyler, Varina High School. Answer Now. 1) Solve 2x - 4y = 7 for x To get x by itself, what is the first step?. Add 2x Subtract 2x Add 4y Subtract 4y.

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solve literal equations (formulas) for a specified variable. SOL: A.1

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Solve literal equations formulas for a specified variable sol a 1

ObjectiveThe student will be able to:

solve literal equations (formulas) for a specified variable.

SOL: A.1

Designed by Skip Tyler, Varina High School


1 solve 2x 4y 7 for x to get x by itself what is the first step

Answer Now

1) Solve 2x - 4y = 7 for xTo get x by itself, what is the first step?

  • Add 2x

  • Subtract 2x

  • Add 4y

  • Subtract 4y


1 solve 2x 4y 7 for x use a do undo chart to help determine the steps

Ask yourself,

What is the first thing we are doing to x?

What is the second thing?

1) Solve 2x - 4y = 7 for xUse a DO-UNDO chart to help determine the steps

DO UNDO

· 2

-4y

Follow the steps in the ‘undo’ column to isolate the variable.

+4y

÷ 2

Complete the undo column by writing the opposite operations in opposite order.


1 solve 2x 4y 7 for x

D U

1) Solve 2x - 4y = 7 for x

· 2

-4y

+4y

÷ 2

+ 4y + 4y

2x = 7 + 4y

2 2

  • Draw “the river”

  • Add 4y to both sides

  • Simplify

  • Divide both sides by 2

  • Does it simplify?

This fraction cannot be simplified because both terms in the numerator are not divisible by 2.


2 solve 2x 4y 7 for y to get y by itself what is the first step

Answer Now

2) Solve 2x - 4y = 7 for yTo get y by itself, what is the first step?

  • Add 2x

  • Subtract 2x

  • Add 4y

  • Subtract 4y


2 solve 2x 4y 7 for y

D U

2) Solve 2x - 4y = 7 for y

· -4

+2x

-2x

÷ -4

- 2x - 2x

-4y = 7 - 2x

-4 -4

  • Draw “the river”

  • Subtract 2x from both sides

  • Simplify

  • Divide both sides by -4

  • Does it simplify?

Nope!


3 solve for y what is the first step

Answer Now

3) Solve for y.What is the first step?

  • Multiply by 3

  • Divide by 3

  • Add a

  • Subtract a


3 solve for y

D U

3) Solve for y:

+ a

÷ 3

· 3

- a

  • Draw “the river”

  • Clear the fraction – multiply both sides by 3

  • Simplify

  • Subtract a from both sides

  • Simplify

y + a = 3c

-a -a

y = 3c - a


4 solve for y 4x 2y 12

Answer Now

4) Solve for y: 4x – 2y = 12

  • -4x + 12

  • 4x - 12

  • -2x + 6

  • 2x - 6


Solve literal equations formulas for a specified variable sol a 1

D U

4) Solve for y: 4x – 2y = 12

· -2

+ 4x

- 4x

÷ -2

- 4x - 4x

-2y = 12 – 4x

-2 -2

y = -6 + 2x

or y = 2x - 6

  • Draw “the river”

  • Subtract 4x from both sides

  • Simplify

  • Divide both sides by -2

  • Does it simplify?

Yes!


Solve literal equations formulas for a specified variable sol a 1

Answer Now

5) The formula for the volume of a rectangular prism is V = LWH. Which equation solves the formula for L?

  • L = V - WH


6 the formula for the volume of a pyramid is v which equation solves the formula for h

Answer Now

6) The formula for the volume of a pyramid is V = . Which equation solves the formula for h?

  • h = 3Vb


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