Question 164804
ok equations to work with. first R(rizzas age)= 2 N(norries age)+1

now eight years ago the sum of their ages so lets write that as (R-8)+ (N-8)
= to rizzas age 10 years from now written as R+10

so we have R=2N+1 and R-8+N-8=R+10   substituting R=2N+1 into the 2nd equation we have (2N+1)-8+N-8=(2N+1)+10   solving for N we arrive at N=26  now plugging this value into R=2N+1 we arrive at R=53

so Rizzas age was 53 and Norries was 26   

checking for eight years ago we have Rizza at 45 and Norrie at 18  add those 2 numbers together and you get 63 which is 10 years older than Rizza's age at this time.