Well if you subtract 8 from the total sum 80 you’ll be left with 72 and since you have two people divided 72/2 = 36 their both 36 at that step but wades older by 6yrs so then you subtract 6 from Mariah and add 6 to Wade. So now Mariah is 30 and Wades 42 add those together and add 8 or add 8 to either of their ages to check you answer.