Question

Jeremy bought postcards on a trip. He

sent 5 cards to his aunt. He sent half of
the remaining cards to friends. Then he
sent one of the remaining cards to his
sister. He was left with 4 cards. Write
and solve an equation to find out how
many postcards Jeremy bought.

Answer 1

T = total #

T = 5 (to the aunt) + 1/2 (T - 5) (to his friends) + 1 (to his sister) + 4 (left)

T = 5 + 1/2 (T - 5) + 1 + 4

T = 10 + 1/2 (T - 5)

2T = 20 + (T - 5)

2T = 20 + T - 5

2T = 15 + T

T = 15

Explanation: