Shannon had some cards at first. She gave 25 of her cards to her sister and 13 of her cards to her friend. After that, her mother gave her another 16 cards. She had 60 cards in the end. How many cards did Shannon have at first?
Fraction of cards left after giving to her sister and her friend
= 1 -
25 -
13 = 1 -
615 -
515 = 1 -
1115 =
415 Number of cards left after giving to her sister and her friend = 4 u
Number of cards left after her mother gave her another 16 cards = 4 u + 16
4 u + 16 = 60
4 u = 60 - 16
4 u = 44
1 u = 44 ÷ 4 = 11
Number of cards that Shannon had at first
= 15 u
= 15 x 11
= 165
Answer(s): 165
