Vincent had
29 as many cards as Abi. After Vincent bought another 58 cards, he had 12 less cards than Abi. How many cards did Vincent have at first?
| |
Vincent |
Abi |
| Before |
2 u |
9 u |
| Change |
+ 58 |
|
| After |
2 u + 58 |
9 u |
Abi had 12 more cards than Vincent in the end. So, if Vincent had another 12 cards, he would have the same number of cards as Abi.
9 u = 2 u + 58 + 12
9 u - 2 u = 58 + 12
7 u = 70
1 u = 70 ÷ 7 = 10
Number of cards that Vincent had at first
= 2 u
= 2 x 10
= 20
Answer: 20
