Owen has 277 marbles and Daniel has 475 marbles. How many marbles must Daniel give to Owen so that Owen will have 72 less marbles than Daniel?
| |
Owen |
Daniel |
Total |
| Before |
277 |
475 |
752 |
| Change |
+ ? |
- ? |
|
| After |
1 u |
1 u + 72 |
752 |
The total number of marbles remains unchanged after Daniel gives to Owen.
Total number of marbles
= 277 + 475
= 752
Total number of marbles in the end
= 1 u + 1 u + 72
= 2 u + 72
2 u + 72 = 752
2 u = 752 - 72
2 u = 680
1 u = 680 ÷ 2 = 340
Number of marbles that Daniel must give to Owen
= 340 - 277
= 63
Answer(s): 63
