Penelope had some pencils at first. She gave 29 of her pencils to her sister and 16 of her pencils to her friend. After that, her mother gave her another 15 pencils. She had 92 pencils in the end. How many pencils did Penelope have at first?
Fraction of pencils left after giving to her sister and her friend
= 1 -
29 -
16 = 1 -
418 -
318 = 1 -
718 =
1118 Number of pencils left after giving to her sister and her friend = 11 u
Number of pencils left after her mother gave her another 15 pencils = 11 u + 15
11 u + 15 = 92
11 u = 92 - 15
11 u = 77
1 u = 77 ÷ 11 = 7
Number of pencils that Penelope had at first
= 18 u
= 18 x 7
= 126
Answer(s): 126
