Daniel has 109 balls and Jeremy has 449 balls. How many balls must Jeremy give to Daniel so that Daniel will have 138 less balls than Jeremy?
| |
Daniel |
Jeremy |
Total |
| Before |
109 |
449 |
558 |
| Change |
+ ? |
- ? |
|
| After |
1 u |
1 u + 138 |
558 |
The total number of balls remains unchanged after Jeremy gives to Daniel.
Total number of balls
= 109 + 449
= 558
Total number of balls in the end
= 1 u + 1 u + 138
= 2 u + 138
2 u + 138 = 558
2 u = 558 - 138
2 u = 420
1 u = 420 ÷ 2 = 210
Number of balls that Jeremy must give to Daniel
= 210 - 109
= 101
Answer(s): 101
