Solving Equations and models

Solving Equations and models

By Rayya Carrington

A model is a picture, drawing, structure, etc.

EQUATION​

(2 expressions that are equal)

2x + 1 = 15

An equation

2x -1 = 5​

can be expressed as a model.

​=

x​

x​

1​

​1

​1

​1

​-1

1​

​2x -1 = 5​

​Math's Golden Rule

What you do to one side of the equation you MUST do to the other side of the equation!

Math | 7th Grade

ALWAYS ALWAYS ALWAYS​

Multiple Choice

What is the equation modeled?

• 2 - 4 = 10

• 2x - 4 = 10

• 2 + 4 = 10

• 2x + 4 =10

Multiple Choice

In the two step equation 2x -4 =10, what is the first step?

• add 2 to BOTH sides

• divide by 2 on BOTH sides

• add 4 to BOTH sides

• subtract 4 from BOTH sides

Multiple Choice

In the two step equation 2x -4 =10, what is the second step?

• add 2 to BOTH sides

• divide by 2 on BOTH sides

• add 4 to BOTH sides

• subtract 4

Multiple Choice

The solution to the modeled equation 2x - 4 = 10 is?

• x = 14

• x = 2

• x = 7

• x = -4