Solve for Missing Variable

1

100

r + 12 = 56

r = 44

200

e - 34 = 118

e = 152

300

180 - p = 121

p = 59

400

w - 71 = 853

w = 924

500

23 + c = 437

c = 414

2

100

b + 439 = 745

b = 306

200

a - 123 = 73

a = 196

300

790 + h = 1000

h = 210

400

k - 90 = 180

k = 270

500

34 + r = 156

r = 122

3

100

122 + p = 150

p = 28

200

b - 200 = 743

b = 943

300

w + 89 = 542

w = 453

400

c - 931 = 45

c = 976

500

e + 54 = 234

e = 180

4

100

q - 34 = 745

q = 779

200

z + 432 = 701

z = 269

300

t - 243 = 102

t = 345

400

b - 65 = 12

b = 77

500

y + 2390 = 5000

y = 2610