Henry had
25 as many marbles as Lucy. After Henry gave away 63 marbles, he had 99 less marbles than Lucy. How many marbles did Lucy have?
| |
Henry |
Lucy |
| Before |
2 u |
5 u |
| Change |
- 63 |
|
| After |
2 u - 63 |
5 u |
Lucy had 99 more marbles than Henry in the end. So, if Henry had another 99 marbles, he would have the same number of marbles as Lucy.
5 u = 2 u - 63 + 99
5 u - 2 u = 99 - 63
3 u = 36
1 u = 36 ÷ 3 = 12
Number of marbles that Lucy had at first
= 5 u
= 5 x 12
= 60
Answer: 60
