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Jeremy bought postcards on a trip. He sent 5 cards to his aunt. He sent half of the remaining cards to his friends. Then he sent one of the remaining cards to his sister. He was left with 4 cards. Find out how many postcards Jeremy bought.

 Jan 28, 2020
 #1
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'x' = number of postcards

 

sends off 5      now has    x-5   remaining

 

sends off 1/2         now has    1/2 (x-5)   remaining

 

thens sends one to sis       1/2 (x-5) -1   remaining   and this equal   4

 

1/2 (x-5) -1   = 4          solve for 'x' the number of postcards he purchased....     

 Jan 28, 2020

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