Betty has 4 times as many coins as Gillian. Gillian has
38 as many coins as Gwen. If the three of them have a total of 69 coins, how many coins does Betty have?
| Betty |
Gillian |
Gwen |
| 4x3 |
1x3 |
|
| |
3x1 |
8x1 |
| 12 u |
3 u |
8 u |
The number of coins that Gillian has is repeated. Make the number of coins that Gillian has the same. LCM of 1 and 3 is 3.
Total number of coins that the three of them have
= 12 u + 3 u + 8 u
= 23 u
23 u = 69
1 u = 69 ÷ 23 = 3
Number of coins that Betty has
= 12 u
= 12 x 3
= 36
Answer(s): 36
