solve for x
solve for y
solve for w
100

x + 22 =40

x=18

100

1/2y = 2

x = 4

100

3w=30

w=10

200

x/3=9

x = 27

200

25y=100

y = 4

200

w - 40 = 40

w=80

300

x - 4 = 22

x =26

300

100y= 100

y =1

300

w - 3= 300

w =303

400

4x=16

x= 4

400

25 + y = 25

y=0

400

w + 25 = 50

w =25

500

6x=36

x =6

500

y + 700 = 800

y =100

500

500w=500

w = 1