Luis has
310 as many erasers as Warren. They have a total of 286 erasers. How many erasers must Warren give to Luis so that they will have the same number of erasers?
|
Luis |
Warren |
Total |
Before |
3 u |
10 u |
13 u |
Change |
+ ? |
- ? |
|
After |
143 |
143 |
286 |
Total number of erasers
= 3 u + 10 u
= 13 u
13 u = 286
1 u = 286 ÷ 13 = 22
Number of erasers that each of them has in the end
= 286 ÷ 2
= 143
Number of erasers that Luis has
= 3 u
= 3 x 22
= 66
Number of erasers that Warren must give Luis
= 143 - 66
= 77
Answer(s): 77