Wendy had some buttons at first. She gave 29 of her buttons to her sister and 16 of her buttons to her best friend. After that, her mother gave her another 9 buttons. She had 86 buttons in the end. How many buttons did Wendy have at first?
Fraction of buttons left after giving to her sister and her best friend
= 1 -
29 -
16 = 1 -
418 -
318 = 1 -
718 =
1118 Number of buttons left after giving to her sister and her best friend = 11 u
Number of buttons left after her mother gave her another 9 buttons = 11 u + 9
11 u + 9 = 86
11 u = 86 - 9
11 u = 77
1 u = 77 ÷ 11 = 7
Number of buttons that Wendy had at first
= 18 u
= 18 x 7
= 126
Answer(s): 126
