Luke has 160 balls and Bryan has 440 balls. How many balls must Bryan give to Luke so that Luke will have 130 less balls than Bryan?
|
Luke |
Bryan |
Total |
Before |
160 |
440 |
600 |
Change |
+ ? |
- ? |
|
After |
1 u |
1 u + 130 |
600 |
The total number of balls remains unchanged after Bryan gives to Luke.
Total number of balls
= 160 + 440
= 600
Total number of balls in the end
= 1 u + 1 u + 130
= 2 u + 130
2 u + 130 = 600
2 u = 600 - 130
2 u = 470
1 u = 470 ÷ 2 = 235
Number of balls that Bryan must give to Luke
= 235 - 160
= 75
Answer(s): 75