Kimberly has 2 times as many erasers as Dana. Dana has
47 as many erasers as Vanessa. If the three of them have a total of 209 erasers, how many erasers does Vanessa have?
Kimberly |
Dana |
Vanessa |
2x4 |
1x4 |
|
|
4x1 |
7x1 |
8 u |
4 u |
7 u |
The number of erasers that Dana has is repeated. Make the number of erasers that Dana has the same. LCM of 1 and 4 is 4.
Total number of erasers that the three of them have
= 8 u + 4 u + 7 u
= 19 u
19 u = 209
1 u = 209 ÷ 19 = 11
Number of erasers that Vanessa has
= 7 u
= 7 x 11
= 77
Answer(s): 77