Fiona had some erasers at first. She gave 29 of her erasers to her brother and 16 of her erasers to her buddy. After that, her mother gave her another 14 erasers. She had 91 erasers in the end. How many erasers did Fiona have at first?
Fraction of erasers left after giving to her brother and her buddy
= 1 -
29 -
16 = 1 -
418 -
318 = 1 -
718 =
1118 Number of erasers left after giving to her brother and her buddy = 11 u
Number of erasers left after her mother gave her another 14 erasers = 11 u + 14
11 u + 14 = 91
11 u = 91 - 14
11 u = 77
1 u = 77 ÷ 11 = 7
Number of erasers that Fiona had at first
= 18 u
= 18 x 7
= 126
Answer(s): 126
