Zeph and Ahmad have a total of 64 coins. If Zeph gives Ahmad 21 coins, Ahmad will have 3 times as many coins as him. Find
(a) Zeph's coins
(b) Ahmad's coins
|
Zeph |
Ahmad |
Total |
Before |
1 u + 21 |
3 u - 21 |
64 |
Change |
- 21 |
+ 21 |
|
After |
1 u |
3 u |
4 u |
(a)
Total number of coins
= 1 u + 3 u
= 4 u
4 u = 64
1 u = 64 ÷ 4 = 16
Number of coins that Zeph has
= 1 u + 21
= 16 + 21
= 37
(b)
Number of coins that Ahmad has
= 64 - 37
= 27
Answer(s): (a) 37; (b) 27