Tommy had 325 coins less than Xuan. Given that they have a total of 635 coins,
- How many coins did Xuan have?
- How many coins did Tommy have?
(a)
Number of coins that Xuan had = 1 u
Number of coins that Tommy had = 1 u - 325
Total number of coins
= 1 u + 1 u - 325
= 2 u - 325
2 u - 325 = 635
2 u = 635 + 325
2 u = 960
1 u = 960 ÷ 2 = 480
Number of coins that Xuan had
= 1 u
= 480
(b)
Number of coins that Tommy had
= 1 u - 325
= 480 - 325
= 155
Answer(s): (a) 480; (b) 155
