Expressions and Equations

Vocabulary

100

This type of math problem has no equal sign.

Expression

200

This type of math problem has an equal sign.

Equation

300

Another word for numbers used in expressions and equations

Constant

400

Another word for the letters used in expressions and equations.

Variable

500

The number in front of a variable is called this.

Coefficient

Two Step Equations

100

-2x + 1 = 5

x=-2

200

x/3-4=11

x=45

300

-2x-5=-11

x=3

400

x/2 + 1 = -6

x=-14

500

-(3x + 4 ) = -10

x=2

One step equations

100

x/10 = 3

30

200

8x = -64

-8

300

x + 5 = - 9

-14

400

x - 8 = -10

-2

500

2/3x = -4

x= -6

Simplify Expressions

100

Simplify:

3(x+2)

3x + 6

200

Simplify

-4 (m + 9)

-4m - 36

300

Simplify:

3x - 2y + 4y - 9x  

-6x + 2y

400

Simplify:

(3x + 4) - (-2x - 5)

5x + 9

500

Simplify:

-2 (-3x + 4) - 2.8

6x - 10.8

Word Problems

100

Jenny is 4 years older than Freddie.  If Freddie is 16, how old is Jenny

20

200

Write the word sentence as an equation. 

five less than twice a variable is ten. 

2x - 5 = 10

300

Jerry pays $45 to register for the new gym in town and $20 a month.  If he spends $165, how many months did he belong to the gym?

6

400

For a field trip 4 students rode in cars and the rest filled 9 buses.  How many students were on each bus if 472 students were on the trip?

52

500

The sum of three consecutive even numbers is 54.  What is the smallest of these numbers.

16