Julian had
710 as many buttons as Wendy. After Julian bought another 17 buttons, he had 13 less buttons than Wendy. How many buttons did Julian have at first?
| |
Julian |
Wendy |
| Before |
7 u |
10 u |
| Change |
+ 17 |
|
| After |
7 u + 17 |
10 u |
Wendy had 13 more buttons than Julian in the end. So, if Julian had another 13 buttons, he would have the same number of buttons as Wendy.
10 u = 7 u + 17 + 13
10 u - 7 u = 17 + 13
3 u = 30
1 u = 30 ÷ 3 = 10
Number of buttons that Julian had at first
= 7 u
= 7 x 10
= 70
Answer: 70
