Riordan and Raeann share some stamps.
67 of Riordan's stamps is equal to
611 of Raeann's stamps. Given that Riordan has 20 stamps less than Raeann, how many stamps do they have altogether?
67 of Riordan's stamps = 611 of Raeann's stamps
Number of Riordan's stamps = 7 u
Number of Raeann's stamps = 11 u
Number of stamps that Riordan has less than Raeann
= 11 u - 7 u
= 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Total number of stamps
= 7 u + 11 u
= 18 u
= 18 x 5
= 90
Answer(s): 90
