Answer:
Sam had 67 cards at the start.
Step-by-step explanation:
Given:
number of cards added to the collection = 9
Number of cards left = 38
we need to find the total number of cards Sam had in the start.
Solution:
Let the Total number of cards Sam had in the start be 'x'.
number of cards added to the collection = 9
So Total number of cards after addition =
Also Given:
His dog ate half of the collection;
So we can say that;
Total number of cards after dog ate =
Now we can say that;
Total number of cards after dog ate is equal to Number of cards left with him.
framing in equation form we get;
Multiplying both side by 2 we get;
Now subtracting both side by 9 we get;
Hence Sam had 67 cards at the start.