Michael and Xandra shared some pens equally. After Xandra bought 73 pens and Michael gave 187 pens away, they had 168 pens left. How many pens did each of them have at first?
| |
Michael |
Xandra |
Total |
| Before |
1 u |
1 u |
|
| Change |
+ 73 |
- 187 |
|
| After |
1 u + 73 |
1 u - 187 |
168 |
Michael and Xandra had the same number of pens at first.
Total number of pens in the end
= 1 u + 73 + 1 u - 187
= 1 u + 1 u + 73 - 187
= 2 u - 114
2 u - 114 = 168
2 u = 168 + 114
2 u = 282
1 u = 282 ÷ 2 = 141
Number of pens that each of them had at first
= 1 u
= 141
Answer(s): 141
