Sabrina had the same number of silver, red and white cards at first. After giving some silver and red cards and 64 white cards away, Sabrina had 156 cards left. There were 4 times as many silver cards as red cards left. The number of white cards left was 15 fewer than the number of silver cards left. How many white cards did she have at first?
| |
Red |
Silver |
White |
Total |
| Before |
4 u + 49 |
4 u + 49 |
4 u + 49 |
|
| Change |
- 3 u - 49 |
- 49 |
- 64 |
|
| After |
1 u |
4 u |
4 u - 15 |
156 |
Sabrina had the same number of silver, red and white cards at first.
Total number of cards in the end
= 1 u + 4 u + 4 u - 15
= 9 u - 15
9 u - 15 = 156
9 u = 156 + 15
9 u = 171
1 u = 171 ÷ 9 = 19
Number of white cards that Sabrina had at first
= 4 u - 15 + 64
= 4 u + 49
= 4 x 19 + 49
= 125
Answer(s): 125
