Justin and Tammy shared some buttons equally. After Tammy bought 72 buttons and Justin gave 175 buttons away, they had 443 buttons left. How many buttons did each of them have at first?
| |
Justin |
Tammy |
Total |
| Before |
1 u |
1 u |
|
| Change |
+ 72 |
- 175 |
|
| After |
1 u + 72 |
1 u - 175 |
443 |
Justin and Tammy had the same number of buttons at first.
Total number of buttons in the end
= 1 u + 72 + 1 u - 175
= 1 u + 1 u + 72 - 175
= 2 u - 103
2 u - 103 = 443
2 u = 443 + 103
2 u = 546
1 u = 546 ÷ 2 = 273
Number of buttons that each of them had at first
= 1 u
= 273
Answer(s): 273
