Let the weekly wage for craftsmen be c

Let the weekly wage for apprentices be a, then:

16c + 5a = 740.............................(1)

9c + 30a = 740.............................(2)

96c + 30a = 4440 .........................(3) which we got by 6*(1)

9c +30a = 740...............................(2)

Subracting (2) from (3) we obtain:

87c = 3700

=> c =42.53

But 9c + 30a = 740

=> 9(42.53) + 30a = 740

=> a = (740 - 382.77)/30 =11.91

Times must be rough in England, a weeks work only earning 42 pounds! and 12 pounds if you're an apprentice!