Question 236485
Adam = A
Cynthia = C
Fred = F

A=3*C
F+16=A

3*C = F+16  (1)

(A-1) = (C-1)+(F-1)

3*C-1 = (C-1)+(F-1)

3*C = C+F-1

2C = F-1  (2)

(1) - (2)

C = 17

Therefore

A = 51

F = 35

Does this make sense?

Do you need further clarification?