Glen has 229 balls and Julian has 321 balls. How many balls must Julian give to Glen so that Glen will have 66 less balls than Julian?
|
Glen |
Julian |
Total |
Before |
229 |
321 |
550 |
Change |
+ ? |
- ? |
|
After |
1 u |
1 u + 66 |
550 |
The total number of balls remains unchanged after Julian gives to Glen.
Total number of balls
= 229 + 321
= 550
Total number of balls in the end
= 1 u + 1 u + 66
= 2 u + 66
2 u + 66 = 550
2 u = 550 - 66
2 u = 484
1 u = 484 ÷ 2 = 242
Number of balls that Julian must give to Glen
= 242 - 229
= 13
Answer(s): 13