Expressions and Equations

Vocabulary

100

What do equations have that expressions do not have?

=

200

What is the variable in the following expression?

3x + 5 = 11

x

300

Which step comes first when SOLVING equations?

Undo addition or subtraction OR

Undo multiplication or division

Undo addition or subtraction

400

What is the check for this problem:

x + 5 = 12, and x = 7

x + 5 = 12

7 + 5 = 12

12 = 12

500

What is the first step in solving the following problem:

x - 5 = 12

Add 5 to both sides.

1-Step Equations: Addition

100

x + 5 = 12

x = 7

200

x + 4 = 10

x = 6

300

x  + 3 = 12

x = 9

400

35 = x + 10

x = 15

500

11 + x = 21

x = 10

Evaluate Expressions

100

x= 5

2x = _____

10

200

x= 3

5x -2 = ______

13

300

x= 4

2x +4x = _______

20

400

x= 3   y= 2

3x - 2y = _______

5

500

x= 4      y= 1

2x + 7y - 2 = ______

13

Simplify Expressions

100

Simplify: 2z + 4z

6z

200

Simplify: 3x + 2 - 2x

x + 2

300

Simplify: 3x + 4 - 2 + 6x

9x + 2

400

Simplify: 5n + 3 + n + 7

6n + 10

500

Simplify: 3 + 4x - 2 + 5

4x + 6

1-Step Equations: Subtraction

100

x - 10 = 12

x=22

200

24 = x - 21

x = 45

300

x - 19 = 10

x = 29

400

x - 45 = 45

x = 90

500

75 = x - 25

x = 100