Tommy had
38 as many cards as Opal. After Tommy bought another 14 cards, he had 16 less cards than Opal. How many cards did Tommy have at first?
|
Tommy |
Opal |
Before |
3 u |
8 u |
Change |
+ 14 |
|
After |
3 u + 14 |
8 u |
Opal had 16 more cards than Tommy in the end. So, if Tommy had another 16 cards, he would have the same number of cards as Opal.
8 u = 3 u + 14 + 16
8 u - 3 u = 14 + 16
5 u = 30
1 u = 30 ÷ 5 = 6
Number of cards that Tommy had at first
= 3 u
= 3 x 6
= 18
Answer: 18