Ch. 3 Review

3.1

100

-1.8 + h = -3.8

h = -2

200

-x + 6 = 4

2

300

Fifty-one more than a number is -12. What is the number?

-63

400

If -15 is subtracted from a number, the result is -29. What is the number?

-44

500

|y| - 2 = 8

{10, -10}

3.2

100

4x = 44

x = 11

200

-17d = 0

d = 0

300

Negative nine times a number is -108. Find the number.

12

400

One hundred twenty seniors are on the honor roll. This represents one third of the senior class. How many seniors are there? 

360 seniors

500

99 = -11/5x

-45

3.3

100

3y - 7y = 28

-7

200

-1/2(x +4) = 16

-36

300

4y/5 = 28

35

400

4c + 3(c-2) = -34

-4

500

b - (1 - 2b) + (b-3) = -4

0

3.4

100

The sum of 38 and twice a number is 124. Find the number.

43

200

Four more than two thirds of a number is 22. Find the number. 

27

300

Find three consecutive odd integers whose sum is 105.

33, 35, 37

400

The length of a rectangle is 7 cm more than the width. The perimeter  is 78 cm. Find the rectangle's dimensions. 

16 cm x 23 cm

500

The perimeter of a rectangle is 332 cm and the width is 76 cm. Find the rectangle's length. 

90 cm

3.5

100

5n = 2n + 6

2

200

39c + 78 = 33c

-13

300

4 + y/5 = y

1

400

3(m + 5) - 6 = 3(m + 3)

Identity

500

5(2m + 3) - (1 - 2m) =2[3(3 + 2m) - (3 - m)]

-1