Roshel has 2 times as many erasers as Rachel. Rachel has
27 as many erasers as Eva. If the three of them have a total of 78 erasers, how many erasers does Eva have?
| Roshel |
Rachel |
Eva |
| 2x2 |
1x2 |
|
| |
2x1 |
7x1 |
| 4 u |
2 u |
7 u |
The number of erasers that Rachel has is repeated. Make the number of erasers that Rachel has the same. LCM of 1 and 2 is 2.
Total number of erasers that the three of them have
= 4 u + 2 u + 7 u
= 13 u
13 u = 78
1 u = 78 ÷ 13 = 6
Number of erasers that Eva has
= 7 u
= 7 x 6
= 42
Answer(s): 42
