Gabriel has 281 balls and Tom has 411 balls. How many balls must Tom give to Gabriel so that Gabriel will have 72 less balls than Tom?
| |
Gabriel |
Tom |
Total |
| Before |
281 |
411 |
692 |
| Change |
+ ? |
- ? |
|
| After |
1 u |
1 u + 72 |
692 |
The total number of balls remains unchanged after Tom gives to Gabriel.
Total number of balls
= 281 + 411
= 692
Total number of balls in the end
= 1 u + 1 u + 72
= 2 u + 72
2 u + 72 = 692
2 u = 692 - 72
2 u = 620
1 u = 620 ÷ 2 = 310
Number of balls that Tom must give to Gabriel
= 310 - 281
= 29
Answer(s): 29
