Zoe had some pencils at first. She gave 18 of her pencils to her sister and 14 of her pencils to her buddy. After that, her mother gave her another 7 pencils. She had 22 pencils in the end. How many pencils did Zoe have at first?
Fraction of pencils left after giving to her sister and her buddy
= 1 -
18 -
14 = 1 -
18 -
28 = 1 -
38 =
58 Number of pencils left after giving to her sister and her buddy = 5 u
Number of pencils left after her mother gave her another 7 pencils = 5 u + 7
5 u + 7 = 22
5 u = 22 - 7
5 u = 15
1 u = 15 ÷ 5 = 3
Number of pencils that Zoe had at first
= 8 u
= 8 x 3
= 24
Answer(s): 24
