On a shelf, there were 58 blouses and jackets. Sean spilt juice on the shelf and stained 50% of the jackets and 10% of the blouses. If 45 blouses and jackets were still clean, how many clean jackets were there?
| |
Blouses |
Jackets |
Total |
| Stained |
1 u |
1 p |
13 |
| Clean |
9 u |
1 p |
45 |
| Total |
10 u |
2 p |
58 |
50% =
50100 =
12 10% =
10100 =
110 Number of stained clothes
= 58 - 45
= 13
9 u + 1 p = 45
1 p = 45 - 9 u --- (1)
1 u + 1 p = 13
1 p = 13 - 1 u --- (2)
(2) - (1)
13 - 1 u = 45 - 9 u
9 u - 1 u = 45 - 13
8 u = 32
1 u = 32 ÷ 8 = 4
Number of clean jackets is the same as the number of stained jackets.
Number of clean jackets
= 13 - 1 u
= 13 - 4
= 9
Answer(s): 9
