Oliver and Rael had the same number of coins. Oliver gave away
34 of his coins while Rael gave away
35 of his coins. Given that Oliver gave away 12 coins more than Rael, how many coins did Oliver have at first?
| |
Oliver's coins |
Rael's coins |
| Before |
4x5 =
20 u |
5x4 =
20 u |
| Change |
- 3x5 =
- 15 u |
- 3x4 =
- 12 u |
| After |
1x5 =
5 u |
2x4 =
8 u |
The number of cards that Oliver and Rael each had at first is the same. Make the number of cards that Oliver and Rael each had at first the same. LCM of 4 and 5 is 20.
Number of coins that Oliver gave away more than Rael
= 15 u - 12 u
= 3 u
3 u = 12
1 u = 12 ÷ 3 = 4
Number of coins that Oliver had at first
= 20 u
= 20 x 4
= 80
Answer(s): 80
