one step equations

1

100

a + 3 = 8

a=5

200

8 + a = 12

a=4

300

p + 7 = 18 

p=11

400

21 + a = 30

a=9

500

5d = 45 

d=9

2

100

a - 3 = 4

a=7

200

B - 50 = 11

B=61

300

a - 19 = 13

a=32

400

a - 32= 9

a=41

500

60 / x = 10 

x=6

3

100

a + 5 = 10

a=5

200

 a - 8 = 18

a=26

300

n - 14= 24

n=38

400

6 + r = 18 

r=12

500

7m = 175

m=25

4

100

11+ G= 14

g = 3

200

5 + y = 7

y=2

300

30 = z + 15 

z=15

400

13 + s = 22

s=9

500

x/20=4

x=80

5

100

s + 8 = 16

s=8

200

j + 2 = 7 

j=5

300

j- 7 = 10 

j=17

400

18n=36

n=2

500

1/2k=1

k=2