Question 951308
s=son's age;f=father's age=3s
f-8yrs=5(s-8yrs) Substitute for f.
3s-8yrs=5(s-8yrs)
3s-8yrs=5s-40yrs  Add 40 yrs to each side.
3s+32yrs=5s Subtract 3s from each side.
32yrs=2s Divide each side by 2.
16yrs=s ANSWER 1: The son is 16 years old.
f=3s=3(16yrs)=48 yrs ANSWER 2: The father is 48 years old.
CHECK:
f-8=5(s-8)
48-8=5(16-8)
40=5(8)
40=40