Harry had
35 as many marbles as Nora. After Harry bought another 6 marbles, he had 20 less marbles than Nora. How many marbles did Harry have at first?
| |
Harry |
Nora |
| Before |
3 u |
5 u |
| Change |
+ 6 |
|
| After |
3 u + 6 |
5 u |
Nora had 20 more marbles than Harry in the end. So, if Harry had another 20 marbles, he would have the same number of marbles as Nora.
5 u = 3 u + 6 + 20
5 u - 3 u = 6 + 20
2 u = 26
1 u = 26 ÷ 2 = 13
Number of marbles that Harry had at first
= 3 u
= 3 x 13
= 39
Answer: 39
