Review of Equations and Inequalities

One Step Equations

100

V + 8 = 12

v=4

200

15x = 105

x= 7

300

126 = 14k

k= 9

400

m/4=13

m= 52

500

17x = 204

x= 12

One Step Inequalities

100

15 + b < 23

b < 8

200

x + 7 <= 15

x <= 8

300

m/29<3

m < 87

400

-9n < 63

n > -7

500

17 > -x − 15

-32 < x

x > -32

Two Step Equations

100

9x + 1 = 82

x = 9

200

15 = 2m + 5

m= 5

300

10 + 6v = 124

v= 19

400

2x − 13 = 103

x = 58

500

12 = 2(x+3)

x = 3

Two Step Inequalities

100

2n + 1 > 5

n > 2

200

6<=n/2 + 4

4<=n

n>=4

300

4n + 12 > 32

n > 5

400

v + 45 - 10 < 100

v<65

500

56 > -7x - 7

-9 < x

x > -9

Inequalities

100

What makes the following inequality true?   x - 8 < 3

a) 11                   c) 20

b) 9                     d) 15

b) 9

200

Which of the following makes the equation true?

5x + 4 = 14

a)  2                   c) 5

b)  15                 d) -10

a)2

300

Write an inequality.

There are less than 10 students in Mathcounts Club.

x < 10

400

Write an inequality.

An elevator can carry at most 400 kg.

x <= 400

500

Write an inequality.

Charlie has a minimum of $600 in a savings account.

x >= 600