Ivory bought some coins. She gave
14 of the coins to her brother and sold
35 of the remaining coins. After that, she bought another 168 coins and had the same number of coins that she bought at first. How many coins did Ivory buy at first?
| Her brother |
Remaining coins |
Bought coins |
Total |
1x5 =
5 u |
3x5 =
15 u |
|
4x5 =
20 u |
| |
Sold |
Left |
|
|
| |
3x3 |
2x3 |
|
|
| 5 u |
9 u |
6 u |
168 |
|
The remaining number of coins before Ivory bought another 168 coins is repeated. Make the remaining number of coins the same. LCM of 3 and 5 is 15.
Total number of coins at first = 20 u
Number of coins that Ivory had left and bought after that = 6 u + 168
20 u = 6 u + 168
20 u - 6 u = 168
14 u = 168
1 u = 168 ÷ 14 = 12
Total number of coins at first
= 20 u
= 20 x 12
= 240
Answer(s): 240
