Pre-Algebra Chapter 2 Review

Lesson 1

100

-3/4t = 5

t = -20/3 

or 

t = -6 2/3

200

-2/9g = -7/9

w = 7/2 

or 

w = 3 1/2

300

0.6w = 0.48

w = 0.8

400

-226.8 = 21.6y

y = -10.5

500

-30 = 1.25c

c = -24

Lesson 2

100

11 = 2b + 17

b = 3

200

-17 = 6p - 5

b = -2

300

2g - 3 = -19

g = -8

400

13 = g/3 + 4

g = 27

500

13 - 3d = -8

d = 7

Lesson 3

100

Twenty-two less than three times a number is -70

3n - 22 = -70

200

The product of a number and 4 increased by 16 is -2

4n + 16 = -2

300

Twelve less than the one-fifth of a number is -7

1/5n - 12 = -7

400

Six more than nine times a number is 456

9n + 6 = 456

500

Six less than seven times a number is equal to -20

7n - 6 = -20

Lesson 4

100

-6f + 13 = 2f - 11

f = 3

200

2.5h - 15 = 4h

h = -10

300

2z - 31 = -9z + 24

z = 5

400

5p + 2 = 4p - 1

p = 3

500

3 - 2/9b = 1/3b - 7

b = 18

Lesson 5

100

-5(3m + 6) = -3(4m - 2)

m = -12

200

-7(k + 9) = 9(k - 5) - 14k

k = -9

300

12(x + 3) = 4(2x + 9) + 4x

identity

all solutions 

x=x

400

0.2(x + 50) - 6 = 0.4(3x +20)

x = -4

500

10p - 2(3p - 6) = 4(3p - 6) - 8p

no solution

null set

empty set