Question

Gagan bought 7 new baseball trading cards to add to his collection. The next day his dog ate

half of his collection. There are now only 35 cards left. How many cards did Gagan start with?​

Answer 1

Answer:

Let total number of baseball in collection be x.

Sarthak bought 7 more cards,

Total cards now= x+7

Next day, dog ate half of his card collection= (x+7)/2

There are only 31 cards left now.

i.e. (x+7)/2=31

x+7=31*2

x+7=62

x=62–7

x=55

Thus, sarthak started with total 55 cards in his collection.