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 (without variables) used in expressions and equations

Constant

400

Another word for the letters used in expressions and equations.

Variable

500

Another word for the number before and multiplying the variable

Coefficient

One step equations

100

20 = x + 4

16

200

x - 8 = -10

-2

300

x + 5.8 = -9.6

-15.4

400

^x/₉ = 3.2

28.8

500

0.8x = -6.4

-8

Two Step Equations

100

-2x - 1 = -5

2

200

^x/₅ - 4 = 10

70

300

16x - 20x = 26

6.5

400

-8 = ^x/₃ + 7

-45

500

14x + 2(x - 5) - 10 = -4

-1

Simplify Expressions

100

3(x + 13)

3x + 39

200

(4x + 8) + (19 - 6x)

-2x + 27

300

(5x + 7) - (x - 6)

4x + 13

400

(-4x + 10) + 3(2x - 3)

2x + 1

500

(8x - 12) - 4(4 - 3x)

20x + -28

Mixed Review

100

Identify Terms and Like Terms

10 + 11x - 2 + 4x² - 2x + 3x²

Terms: 10, 11x, -2, 4x² , 2x,  3x²

Like Terms:  4x² , 3x²     11x, 2x,      10, -2

200

Write and solve an equation for this word sentence.

12 less than a number x is negative 8

x - 12 = -8

x = 4

300

Write and solve an equation for this word sentence.

Negative one-fourth of a number x is 8

-¹/₄ x = 8

x = -32

400

Factor out the coefficient

¹/₃x + 10

¹/₃(x + 30)

500

Write and solve an equation for this word sentence.

The temperature is -9^o F.  A warm front came in and increases the temperature to 22^o F. By how many degrees did the temperature decrease.

-9 + x = 22

x = 31