Solving One-Step Equations

Addition

100

x + 4 = 25

x = 21

200

20 = a + 13 

a = 7

300

n + 36 = 75

n = 39

400

399 = 142 + x

x = 257

500

1432 = c + 703

c = 729

Subtraction

100

x - 2 = 6

x = 8

200

19 = d - 11

d = 30

300

k - 64 = 121

k = 185

400

x - 327 = 665

x = 992

500

5008 = g - 1999

g = 7007

Multiplication

100

9x = 27

x = 3

200

7y = 63

y = 9

300

400 = 16m

m = 25

400

672 = 12b

b = 56

500

1125 = 75a

a = 15

Division

100

y/6 = 2

y = 12

200

x/4 = 14

x = 56

300

23 = w/11

w = 253

400

105 = h/17

h = 1785

500

x/71 = 215

x = 15265

Decimals

100

m + 3.7 = 5.4

m = 1.7

200

1  1/2 = q - 1  1/4

q = 2  3/4

300

8.15 = 0.5x

x = 16.3

400

7/8 = r/10

r = 8  3/4

or 35/4

500

3/2x = 9.45 

x = 6.3

or 6  3/10