Min had 128 pens. Ethan had 58 of what Min had. After Min used some of his pens and Ethan used 14 of his pens, Min had 15 as many pens left as Ethan.
- How many pens did Ethan have at first?
- How many pens did Min use?
| |
Min |
Ethan |
| Before |
128 |
80 |
| Change |
- ? |
- 20 |
| After |
12 |
60 |
(a)
Number of pens that Ethan had at first
=
58 x 128
= 80
(b)
Number of pens that Ethan used
=
14 x 80
= 20
Number of pens that Ethan had left
= 80 - 20
= 60
Number of pens that Min had left
=
15 x 60
= 12
Number of pens that Min used
= 128 - 12
= 116
Answer(s): (a) 80; (b) 116
