Solving One-Variable Equations

Addition Equations

100

x -1 = 18

x = 19

200

3 + g = 17

g = 14

300

w + 12.7 = 21.2

w = 8.5

400

71 + x = 126

x = 55

500

p + 9.124 = 17.821

p = 8.697

Subtraction Equations

100

x - 4 = 21

x = 25

200

37 = p - 13

p = 50

300

k - 2.4 = 8.7

k = 11.1

400

543 = t - 468

t = 1,011

500

y - 1.234 = 5.678

y = 6.912

Multiplication Equations

100

2x = 14

x = 7

200

36 = 3x

x = 12

300

2.5c = 12.5

c = 5

400

14.4 = 1.2c

a = 12

500

4.55h = 0

h = 0

Division Equations

100

x/7 = 3

x = 21

200

y/23 = 10

y = 230

300

5 = z/7.3

z = 36.5

400

x/2.53 = 7.1

x = 17.963

500

r/197 = 18.1

r = 3,565.7

Verbal Equations

100

The sum of a number x and 42 is 71

x + 42 = 71

x = 29

200

The product of a number y and 6 is the same as 96.

6y = 96

y = 16

300

The difference of a number g and 3.59 is equal to 9.01

g - 3.59 = 9.01

g = 12.6

400

A number x divided by 21.2 is the same as 14.1

x/21.2 = 14.1

x = 298.92

500

Half of a number x is the same as 16.5.

x/2 =16.5

x = 33