Jaslyn bought four times as many biscuits as Ken. After Jaslyn ate 6 biscuits, she had 9 more biscuits than Ken. How many biscuits did they buy altogether?
| |
Jaslyn |
Ken |
Total |
| Before |
4 u |
1 u |
5 u |
| Change |
- 6 |
|
|
| After |
4 u - 6 |
1 u |
|
The number of biscuits that Ken had remains unchanged.
If Ken had another 9 biscuits in the end, the number of biscuits that Jaslyn and Ken had would be the same.
4 u - 6 = 1 u + 9
4 u - 1 u = 9 + 6
3 u = 15
1 u = 15 ÷ 3 = 5
Total number of biscuits
= 4 u + 1 u
= 5 u
= 5 x 5
= 25
Answer(s): 25
