Lynn had some pencils at first. She gave 16 of her pencils to her brother and 14 of her pencils to her neighbour. After that, her mother gave her another 20 pencils. She had 55 pencils in the end. How many pencils did Lynn have at first?
Fraction of pencils left after giving to her brother and her neighbour
= 1 -
16 -
14 = 1 -
212 -
312 = 1 -
512 =
712 Number of pencils left after giving to her brother and her neighbour = 7 u
Number of pencils left after her mother gave her another 20 pencils = 7 u + 20
7 u + 20 = 55
7 u = 55 - 20
7 u = 35
1 u = 35 ÷ 7 = 5
Number of pencils that Lynn had at first
= 12 u
= 12 x 5
= 60
Answer(s): 60
