Cathy had 69 banana and strawberry biscuits. After giving away
13 of her banana biscuits and 19 of her strawberry biscuits, she had an equal number of banana and strawberry biscuits. How many strawberry biscuits did she have at first?
| |
Banana biscuits |
Strawberry biscuits |
Total |
| Before |
3 u |
2 u + 19 |
69 |
| Change |
- 1 u |
- 19 |
|
| After |
2 u |
2 u |
|
Fraction of the banana biscuits left
= 1 -
13=
23 The number of banana and strawberry biscuits in the end is the same.
Total number of biscuits at first
= 3 u + 2 u + 19
= 5 u + 19
5 u + 19 = 69
5 u = 69 - 19
5 u = 50
1 u = 50 ÷ 5 = 10
Number of strawberry biscuits at first
= 2 u + 19
= 2 x 10 + 19
= 20 + 19
= 39
Answer(s): 39
