Question

Sarthak bought 7 new trading cards to add to his collection. The next day his dog ate half of his
collection. There are now only 31 cards left. How many cards did Sarthak start with ?​

Answer 1

Answer:

55

Step-by-step explanation:

as 7 new trading cards

55+7 = 62

half of 62 is 31

Answer 2

Answer:

let total cards=x

now equation becomes

31+x/2+7=x

x/2-x=-31-7

x-2x=2×(-38)

-x=-76

x=76

total cards he had= 76