Vincent and Riordan have 15 marbles altogether. Vincent has 9 more marbles than Riordan. Find the number of marbles each boy has.
- Riordan
- Vincent
Number of marbles that Riordan has = 1 u
Number of marbles that Vincent has = 1 u + 9
Total number of marbles
= 1 u + 1 u + 9
= 2 u + 9
2 u + 9 = 15
2 u = 15 - 9 = 6
1 u = 6 ÷ 2 = 3
(a)
Number of marbles that Riordan has
= 1 u
= 3
(b)
Number of marbles that Vincent has
= 1 u + 9
= 3 + 9
= 12
Answer(s): (a) 3; (b) 12
