Last Friday, Charlie had twice as many coins as Wesley. Today, Charlie gives 20 of his coins to his friend. Now, Wesley has thrice as many coins as Charlie. How many coins does Wesley have?
| |
Charlie |
Wesley |
| Before |
2x3 =
6 u |
1x3 =
3 u |
| Change |
- 20 |
|
| After |
1 u |
3 u |
The number of coins that Wesley had at first and in the end remains unchanged. Make the number of coins that Wesley has the same. LCM of 1 and 3 is 3.
Number of coins that Charlie gives to his friend
= 6 u - 1 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of coins that Wesley has
= 3 u
= 3 x 4
= 12
Answer(s): 12
