Jane has 2 times as many buttons as Tammy. Tammy has
37 as many buttons as Lucy. If the three of them have a total of 48 buttons, how many buttons does Lucy have?
Jane |
Tammy |
Lucy |
2x3 |
1x3 |
|
|
3x1 |
7x1 |
6 u |
3 u |
7 u |
The number of buttons that Tammy has is repeated. Make the number of buttons that Tammy has the same. LCM of 1 and 3 is 3.
Total number of buttons that the three of them have
= 6 u + 3 u + 7 u
= 16 u
16 u = 48
1 u = 48 ÷ 16 = 3
Number of buttons that Lucy has
= 7 u
= 7 x 3
= 21
Answer(s): 21