Gillian had some coins at first. She gave 19 of her coins to her sister and 13 of her coins to her neighbour. After that, her mother gave her another 5 coins. She had 25 coins in the end. How many coins did Gillian have at first?
Fraction of coins left after giving to her sister and her neighbour
= 1 -
19 -
13 = 1 -
19 -
39 = 1 -
49 =
59 Number of coins left after giving to her sister and her neighbour = 5 u
Number of coins left after her mother gave her another 5 coins = 5 u + 5
5 u + 5 = 25
5 u = 25 - 5
5 u = 20
1 u = 20 ÷ 5 = 4
Number of coins that Gillian had at first
= 9 u
= 9 x 4
= 36
Answer(s): 36
