Solving EquationsSolving Equations

Medina 1

with Multiplication and Division

DefinitionDefinition

Medina 2

Multiplication/division–

inverse operations

Solve:get the letter by itself

opposites

Reciprocal:“Flip the fraction”

variable

34

43

StepStepss

Medina 3

1.Use the inverse operation of multiplication or division on both sides of the equation

2. Check answer

“You know you are done solving when there is a positive 1 in front of the variable.”coefficie

nt

Solving Equations with Algorithm Solving Equations with Algorithm

Medina 4

3-x

4 12x -

4

To Solve:

Remember that when a letter is next to a number it

means multiply

41

Original problem

Divide both sides by 4

Check answer

Solving Equations with Algorithm Solving Equations with Algorithm

Medina 5

3x - 3-4 12x -

12-

Check:

4 12-

12-

Solving Equations with Algorithm Solving Equations with Algorithm

Medina 6

75x

75x

(5)(5)

To Solve:

x 351

Original problem

Multiply both sides by 5

Check answer

Solving Equations with Algorithm Solving Equations with Algorithm

Medina 7

75x

7

535

Check:

7 7

35x

Solving Equations with Algorithm Solving Equations with Algorithm

Medina 8

3

154

x-

3

154

x-

3

To Solve:

x 20-

3

1

Original problem

Multiply both

sides by 4

Check answer

4 4

3 60x- Divide both

sides by -3

Solving Equations with Algorithm Solving Equations with Algorithm

Medina 9

20-

Check:

15 15

20x -

3

154

x-

3

154

-1

5

1