Yesterday, Henry had 20 more marbles than Eric. Today, Henry gave Eric
47 of his marbles. As a result, he has half as many marbles as Eric now. How many marbles did Henry have yesterday?
|
Henry |
Eric |
More |
Before |
7 u |
2 u |
5 u |
Change |
- 4 u |
+ 4 u |
|
After |
3 u |
6 u |
|
Comparing Henry and Eric in the end |
1
|
2
|
|
Number of marbles that Eric has now
= 2 x 3 u
= 6 u
Number of marbles that Henry had more than Eric yesterday
= 7 u - 2 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of marbles that Henry had yesterday
= 7 u
= 7 x 4
= 28
Answer(s): 28