Cameron is 5 years older than Hunter, who is 12 years older than Justin. The sum of their ages is 80. How old is Justin?

Answer 1

C = 5 + H

H = J + 12 --> Rearrange to solve for J --> J = H - 12

C + H + J = 80

Substitute Eq 1 and 2 into Eq 3, you get

5 + H + H + H - 12 = 80

3H - 7 = 80

3H = 87

H = 87 / 3 = 29

Substitute H = 29 into Eq 2

J = H - 12 = 29 - 12 = 17