Archie had
29 as many buttons as Fiona. After Archie gave away 51 buttons, he had 72 less buttons than Fiona. How many buttons did Fiona have?
| |
Archie |
Fiona |
| Before |
2 u |
9 u |
| Change |
- 51 |
|
| After |
2 u - 51 |
9 u |
Fiona had 72 more buttons than Archie in the end. So, if Archie had another 72 buttons, he would have the same number of buttons as Fiona.
9 u = 2 u - 51 + 72
9 u - 2 u = 72 - 51
7 u = 21
1 u = 21 ÷ 7 = 3
Number of buttons that Fiona had at first
= 9 u
= 9 x 3
= 27
Answer: 27
