Barbara had some coins at first. She gave 210 of her coins to her sister and 14 of her coins to her best friend. After that, her mother gave her another 4 coins. She had 103 coins in the end. How many coins did Barbara have at first?
Fraction of coins left after giving to her sister and her best friend
= 1 -
210 -
14 = 1 -
420 -
520 = 1 -
920 =
1120 Number of coins left after giving to her sister and her best friend = 11 u
Number of coins left after her mother gave her another 4 coins = 11 u + 4
11 u + 4 = 103
11 u = 103 - 4
11 u = 99
1 u = 99 ÷ 11 = 9
Number of coins that Barbara had at first
= 20 u
= 20 x 9
= 180
Answer(s): 180
