Elyse had 70 more coins than Ivory. After Ivory gave away
38 of her coins, Elyse had thrice as many coins as Ivory. How many coins did Ivory have at first?
| |
Elyse |
Ivory |
Comparing Elyse and
Ivory at first |
70 more |
|
| Before |
15 u |
8 u |
| Change |
|
- 3 u |
| After |
15 u |
5 u |
Comparing Elyse and
Ivory in the end |
3x5 =
15 u |
1x5 =
5 u |
Number of coins that Ivory had in the end is repeated. Make the number of coins that Ivory had in the end the same. LCM of 1 and 5 is 5.
Number of coins that Elyse had at first = 15 u
Number of coins that Elyse had more than Ivory at first
= 15 u - 8 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Number of coins that Ivory had at first
= 8 u
= 8 x 10
= 80
Answer(s): 80
