Gwen and Gillian had an equal number of coins at first. Gwen used
13 of her coins and Gillian used
16 of her coins. They used 27 coins altogether. How many coins did Gillian have in the end?
| |
Gwen |
Gillian |
| Before |
3x2 =
6 u |
6x1 =
6 u |
| Change |
- 1x2 =
- 2 u |
- 1x1 =
- 1 u |
| After |
2x2 =
4 u |
5x1 =
5 u |
The number of coins that Gwen and Gillian each had at first is the same. Make the number of coins that Gwen and Gillian each had at first the same. LCM of 3 and 6 is 6.
Number of coins that Gwen and Gillian used
= 2 u + 1 u
= 3 u
3 u = 27
1 u = 27 ÷ 3 = 9
Number of coins that Gillian had in the end
= 5 u
= 5 x 9
= 45
Answer(s): 45
