Barbara had some beads at first. She gave 210 of her beads to her sister and 14 of her beads to her best friend. After that, her mother gave her another 17 beads. She had 116 beads in the end. How many beads did Barbara have at first?
Fraction of beads left after giving to her sister and her best friend
= 1 -
210 -
14 = 1 -
420 -
520 = 1 -
920 =
1120 Number of beads left after giving to her sister and her best friend = 11 u
Number of beads left after her mother gave her another 17 beads = 11 u + 17
11 u + 17 = 116
11 u = 116 - 17
11 u = 99
1 u = 99 ÷ 11 = 9
Number of beads that Barbara had at first
= 20 u
= 20 x 9
= 180
Answer(s): 180
