There were 51 more skirts than coats in a shop. After 57 skirts and 30% of the coats were sold, there were an equal number of skirts and coats left. How many coats were there in the shop at first?
| |
Coats |
Skirts |
| Before |
10 u |
7 u + 57 |
| Change |
- 3 u |
- 57 |
| After |
7 u |
7 u |
30% =
30100 =
310There were 51 more skirts than coats at first. If another 51 coats were added at first, the number of coats and skirts would be the same.
10 u + 51 = 7 u + 57
10 u - 7 u = 57 - 51
3 u = 6
1 u = 6 ÷ 3 = 2
Number of coats in the shop at first
= 10 u
= 10 x 2
= 20
Answer(s): 20
