Ian had
710 as many buttons as Anna. After Ian gave away 67 buttons, he had 88 less buttons than Anna. How many buttons did Anna have?
|
Ian |
Anna |
Before |
7 u |
10 u |
Change |
- 67 |
|
After |
7 u - 67 |
10 u |
Anna had 88 more buttons than Ian in the end. So, if Ian had another 88 buttons, he would have the same number of buttons as Anna.
10 u = 7 u - 67 + 88
10 u - 7 u = 88 - 67
3 u = 21
1 u = 21 ÷ 3 = 7
Number of buttons that Anna had at first
= 10 u
= 10 x 7
= 70
Answer: 70