Fred has 201 beads and Will has 372 beads. How many beads must Will give to Fred so that Fred will have 129 less beads than Will?
|
Fred |
Will |
Total |
Before |
201 |
372 |
573 |
Change |
+ ? |
- ? |
|
After |
1 u |
1 u + 129 |
573 |
The total number of beads remains unchanged after Will gives to Fred.
Total number of beads
= 201 + 372
= 573
Total number of beads in the end
= 1 u + 1 u + 129
= 2 u + 129
2 u + 129 = 573
2 u = 573 - 129
2 u = 444
1 u = 444 ÷ 2 = 222
Number of beads that Will must give to Fred
= 222 - 201
= 21
Answer(s): 21