Mathardy Chapter 3

Equations A

100

Solve: x + 8 = 6

x = -2

200

Solve: x – 2 = 5

x = 7

300

Solve: 8x = 24

x = 3

400

Solve:  

x/19 = -6

x = -114

500

Write an equation & Solve for: Fifteen less than a number is -4.

n - 15 = -4; n = 11

Equations B

100

Solve.  (13-4)x =-108

x = -12

200

Solve 

- z/2 = 14

z = -28

300

Solve 

x/4 = 9

x = 36

400

Write an equation and Solve:

How many cookies should be allowed

per person if eight people share 

two dozen cookies?

8c=2(12)

c=3 cookies

500

Solve.  3t – (-t) =12

t = 3

Equations C

100

Solve: 3x + 2 = -10

x = -4

200

Solve 

(x/5) + 2 = 8

x = 30

300

m/9 - 7 = -10

Solve 

m = -27

400

Solve:-7y + 9 = 51

y = -6

500

Solve 

a/2 - 9 = -16

a = -14

Equations D

100

Solve: 

4x + 5x = 45

x = 5

200

Solve: 

3y – 8 + 2y = -28

y = 4

300

Solve: 

-114 = -7a + 6 – 3a

a = 12

400

Solve 

15 + (a/4) + 7 = 35

a = 52

500

Solve:

(3x)/5 + 12 + (2x)/5 = 3

x = -9

Equations E

100

Write an equation & solve. 

-3 times a number, increased by 2 is 23. 

-3n+2=23; n=-7

200

Write an equation & solve.

Five times the difference of a number and -3 is 48

5(n+3)=45; n=6

300

Write an equation & solve.

A number divided by -10, increased by 8, is -4. 

n/-10 + 8 = -4; n=120

400

Write an equation & solve.

16 decreased by the quotient of a number and 3 is 13.

16 - n/3 = 13; n = 9

500

Write an equation & solve.

Six more than the product of  -3 and a number is 30.

-3n + 6= 30; n=-8

Solving Inequalities

100

Solve: x + 8 > 19

x > 11

200

What is the largest integer that is a solution to 

x - 6 <= -8

-2

300

Solve: 3x < -12

x < -4

400

Solve: -6x > 18

x < -3

500

Solve 

a/9 - 27 >= -20

a >= 63