Jen has 2 times as many erasers as Kathy. Kathy has
38 as many erasers as Betty. If the three of them have a total of 204 erasers, how many erasers does Jen have?
Jen |
Kathy |
Betty |
2x3 |
1x3 |
|
|
3x1 |
8x1 |
6 u |
3 u |
8 u |
The number of erasers that Kathy has is repeated. Make the number of erasers that Kathy has the same. LCM of 1 and 3 is 3.
Total number of erasers that the three of them have
= 6 u + 3 u + 8 u
= 17 u
17 u = 204
1 u = 204 ÷ 17 = 12
Number of erasers that Jen has
= 6 u
= 6 x 12
= 72
Answer(s): 72