Equations and Proportions Unit Review

One Step

100

x + 2 = 10

x = 8 

200

y - 5 = 13

y = 18

300

3k = 24

k  = 8

400

x = 6         

3               

x = 18

500

f = -10

-4        

f = 40

Two Step

100

2r + 4 = 6

r = 1

200

5w - 7 = 28

w = 7

300

d  + 2 = 19

3                

d = 7

400

n - 8 = 2

- 6          

n = -60

500

3 = 0.2m - 7

m = 50

Inverse Operations

100

The inverse operation of multiplication.

Division

200

The inverse of subtraction.

Addition

300

The inverse of division.

Multiplication

400

The inverse of addition

Subtraction

500

The inverse of: - 5

+ 5

Word Problems

100

Write the equation and solve:

Kelvin and Mike both took a math quiz. They scored 23 points in all. If Kelvin scored 9 points, how many points did Mike score?

m = mike

m + 9 = 23

Mike scored 14 points

200

Write the equation and solve:

Genesis saves $15 per week. At that rate, how many weeks will it take to save $300?

w = # of weeks

15w = 300

It will take 20 weeks

300

Write the equation and solve: 

The Miami Heat scored 79 points. This was 13 points less than the Chicago Bulls. How many points did the Chicago Bulls Score?

c = Chicago Bulls

c - 13 = 79

The Chicago Bulls scored 92 points.

400

Write the equation and solve:

Caitlin has a $10 gift card to the music store. She has chosen a number of CDs from the $7 bin. If the cost of the CDs is $32 AFTER the gift card is used, how many CDs did Caitlin buy?

c = # of CDs

7c - 10 = 32

Caitlin bought 6 CDs

500

Write the equation and solve:

Alma subscribes to a website for processing her digital pictures. For one month she pays $5.95 and 4-by-6 inch prints are $0.19 each. How many prints does Alma purchase if her total was $15.83.

p = # of prints

0.19p + 5.95 = 15.83

Alma printed 52 photos