Irene had some coins at first. She gave 18 of her coins to her cousin and 24 of her coins to her buddy. After that, her mother gave her another 13 coins. She had 28 coins in the end. How many coins did Irene have at first?
Fraction of coins left after giving to her cousin and her buddy
= 1 -
18 -
24 = 1 -
18 -
48 = 1 -
58 =
38 Number of coins left after giving to her cousin and her buddy = 3 u
Number of coins left after her mother gave her another 13 coins = 3 u + 13
3 u + 13 = 28
3 u = 28 - 13
3 u = 15
1 u = 15 ÷ 3 = 5
Number of coins that Irene had at first
= 8 u
= 8 x 5
= 40
Answer(s): 40
