Raeann had 18 more coins than Tiffany. After Tiffany gave away
38 of her coins, Raeann had twice as many coins as Tiffany. How many coins did Tiffany have at first?
| |
Raeann |
Tiffany |
Comparing Raeann and
Tiffany at first |
18 more |
|
| Before |
10 u |
8 u |
| Change |
|
- 3 u |
| After |
10 u |
5 u |
Comparing Raeann and
Tiffany in the end |
2x5 =
10 u |
1x5 =
5 u |
Number of coins that Tiffany had in the end is repeated. Make the number of coins that Tiffany had in the end the same. LCM of 1 and 5 is 5.
Number of coins that Raeann had at first = 10 u
Number of coins that Raeann had more than Tiffany at first
= 10 u - 8 u
= 2 u
2 u = 18
1 u = 18 ÷ 2 = 9
Number of coins that Tiffany had at first
= 8 u
= 8 x 9
= 72
Answer(s): 72
