Sabrina and Gillian had an equal number of cards at first. Sabrina used
14 of her cards and Gillian used
17 of her cards. They used 33 cards altogether. How many cards did Gillian have in the end?
| |
Sabrina |
Gillian |
| Before |
4x7 =
28 u |
7x4 =
28 u |
| Change |
- 1x7 =
- 7 u |
- 1x4 =
- 4 u |
| After |
3x7 =
21 u |
6x4 =
24 u |
The number of cards that Sabrina and Gillian each had at first is the same. Make the number of cards that Sabrina and Gillian each had at first the same. LCM of 4 and 7 is 28.
Number of cards that Sabrina and Gillian used
= 7 u + 4 u
= 11 u
11 u = 33
1 u = 33 ÷ 11 = 3
Number of cards that Gillian had in the end
= 24 u
= 24 x 3
= 72
Answer(s): 72
