Jack and Vaidev have 7 marbles altogether. Jack has 9 more marbles than Vaidev. Find the number of marbles each boy has.
- Vaidev
- Jack
Number of marbles that Vaidev has = 1 u
Number of marbles that Jack has = 1 u + 9
Total number of marbles
= 1 u + 1 u + 9
= 2 u + 9
2 u + 9 = 7
2 u = 7 - 9 = -2
1 u = -2 ÷ 2 = -1
(a)
Number of marbles that Vaidev has
= 1 u
= -1
(b)
Number of marbles that Jack has
= 1 u + 9
= -1 + 9
= 8
Answer(s): (a) -1; (b) 8
