Kylie had 18 more chocolate bars than Albert at first. After Albert had eaten 15 of his chocolate bars, Kylie had 4 times as many chocolate bars as Albert. How many chocolate bars did Kylie and Albert have in total at first?
| |
Kylie |
Albert |
Total |
| Before |
1 u + 15 + 18 |
1 u + 15 |
5 u + 15 |
| Change |
|
- 15 |
|
| After |
4 u |
1 u |
|
The number of chocolate bars that Kylie had at first remains unchanged.
4 u = 1 u + 15 + 18
4 u - 1 u = 33
3 u = 33
1 u = 33 ÷ 3 = 11
Number of chocolate bars that they had at first
= 5 u + 15
= 5 x 11 + 15
= 55 + 15
= 70
Answer(s): 70
