Xuan had 89 vanilla and apricot biscuits. After giving away
17 of her vanilla biscuits and 11 of her apricot biscuits, she had an equal number of vanilla and apricot biscuits. How many apricot biscuits did she have at first?
| |
Vanilla biscuits |
Apricot biscuits |
Total |
| Before |
7 u |
6 u + 11 |
89 |
| Change |
- 1 u |
- 11 |
|
| After |
6 u |
6 u |
|
Fraction of the vanilla biscuits left
= 1 -
17=
67 The number of vanilla and apricot biscuits in the end is the same.
Total number of biscuits at first
= 7 u + 6 u + 11
= 13 u + 11
13 u + 11 = 89
13 u = 89 - 11
13 u = 78
1 u = 78 ÷ 13 = 6
Number of apricot biscuits at first
= 6 u + 11
= 6 x 6 + 11
= 36 + 11
= 47
Answer(s): 47
