There were 91 more coats than windbreakers in a shop. After 88 coats and 30% of the windbreakers were sold, there were an equal number of coats and windbreakers left. How many windbreakers were there in the shop at first?
| |
Windbreakers |
Coats |
| Before |
10 u |
7 u + 88 |
| Change |
- 3 u |
- 88 |
| After |
7 u |
7 u |
30% =
30100 =
310There were 91 more coats than windbreakers at first. If another 91 windbreakers were added at first, the number of windbreakers and coats would be the same.
10 u + 91 = 7 u + 88
10 u - 7 u = 88 - 91
3 u = -3
1 u = -3 ÷ 3 = -1
Number of windbreakers in the shop at first
= 10 u
= 10 x -1
= -10
Answer(s): -10
