Peter and Ahmad have a total of 65 buttons. If Peter gives Ahmad 18 buttons, Ahmad will have 4 times as many buttons as him. Find
(a) Peter's buttons
(b) Ahmad's buttons
|
Peter |
Ahmad |
Total |
Before |
1 u + 18 |
4 u - 18 |
65 |
Change |
- 18 |
+ 18 |
|
After |
1 u |
4 u |
5 u |
(a)
Total number of buttons
= 1 u + 4 u
= 5 u
5 u = 65
1 u = 65 ÷ 5 = 13
Number of buttons that Peter has
= 1 u + 18
= 13 + 18
= 31
(b)
Number of buttons that Ahmad has
= 65 - 31
= 34
Answer(s): (a) 31; (b) 34