Xandra had some coins at first. She gave 15 of her coins to her cousin and 14 of her coins to her buddy. After that, her mother gave her another 13 coins. She had 112 coins in the end. How many coins did Xandra have at first?
Fraction of coins left after giving to her cousin and her buddy
= 1 -
15 -
14 = 1 -
420 -
520 = 1 -
920 =
1120 Number of coins left after giving to her cousin and her buddy = 11 u
Number of coins left after her mother gave her another 13 coins = 11 u + 13
11 u + 13 = 112
11 u = 112 - 13
11 u = 99
1 u = 99 ÷ 11 = 9
Number of coins that Xandra had at first
= 20 u
= 20 x 9
= 180
Answer(s): 180
