Hilda had the same number of gold, red and pink erasers at first. After giving some gold and red erasers and 48 pink erasers away, Hilda had 248 erasers left. There were 3 times as many gold erasers as red erasers left. The number of pink erasers left was 11 fewer than the number of gold erasers left. How many pink erasers did she have at first?
| |
Red |
Gold |
Pink |
Total |
| Before |
3 u + 37 |
3 u + 37 |
3 u + 37 |
|
| Change |
- 2 u - 37 |
- 37 |
- 48 |
|
| After |
1 u |
3 u |
3 u - 11 |
248 |
Hilda had the same number of gold, red and pink erasers at first.
Total number of erasers in the end
= 1 u + 3 u + 3 u - 11
= 7 u - 11
7 u - 11 = 248
7 u = 248 + 11
7 u = 259
1 u = 259 ÷ 7 = 37
Number of pink erasers that Hilda had at first
= 3 u - 11 + 48
= 3 u + 37
= 3 x 37 + 37
= 148
Answer(s): 148
