Hilda had some marbles at first. She gave 25 of her marbles to her sister and 14 of her marbles to her buddy. After that, her mother gave her another 15 marbles. She had 106 marbles in the end. How many marbles did Hilda have at first?
Fraction of marbles left after giving to her sister and her buddy
= 1 -
25 -
14 = 1 -
820 -
520 = 1 -
1320 =
720 Number of marbles left after giving to her sister and her buddy = 7 u
Number of marbles left after her mother gave her another 15 marbles = 7 u + 15
7 u + 15 = 106
7 u = 106 - 15
7 u = 91
1 u = 91 ÷ 7 = 13
Number of marbles that Hilda had at first
= 20 u
= 20 x 13
= 260
Answer(s): 260
