Sarah had some marbles at first. She gave 19 of her marbles to her sister and 13 of her marbles to her buddy. After that, her mother gave her another 14 marbles. She had 34 marbles in the end. How many marbles did Sarah have at first?
Fraction of marbles left after giving to her sister and her buddy
= 1 -
19 -
13 = 1 -
19 -
39 = 1 -
49 =
59 Number of marbles left after giving to her sister and her buddy = 5 u
Number of marbles left after her mother gave her another 14 marbles = 5 u + 14
5 u + 14 = 34
5 u = 34 - 14
5 u = 20
1 u = 20 ÷ 5 = 4
Number of marbles that Sarah had at first
= 9 u
= 9 x 4
= 36
Answer(s): 36
