There were 89 more sweaters than coats in a shop. After 75 sweaters and 10% of the coats were sold, there were an equal number of sweaters and coats left. How many coats were there in the shop at first?
| |
Coats |
Sweaters |
| Before |
10 u |
9 u + 75 |
| Change |
- 1 u |
- 75 |
| After |
9 u |
9 u |
10% =
10100 =
110There were 89 more sweaters than coats at first. If another 89 coats were added at first, the number of coats and sweaters would be the same.
10 u + 89 = 9 u + 75
10 u - 9 u = 75 - 89
1 u = -14
1 u = -14 ÷ 1 = -14
Number of coats in the shop at first
= 10 u
= 10 x -14
= -140
Answer(s): -140
