Emma and Esther had an equal number of beads at first. Emma used
13 of her beads and Esther used
110 of her beads. They used 91 beads altogether. How many beads did Esther have in the end?
| |
Emma |
Esther |
| Before |
3x10 =
30 u |
10x3 =
30 u |
| Change |
- 1x10 =
- 10 u |
- 1x3 =
- 3 u |
| After |
2x10 =
20 u |
9x3 =
27 u |
The number of beads that Emma and Esther each had at first is the same. Make the number of beads that Emma and Esther each had at first the same. LCM of 3 and 10 is 30.
Number of beads that Emma and Esther used
= 10 u + 3 u
= 13 u
13 u = 91
1 u = 91 ÷ 13 = 7
Number of beads that Esther had in the end
= 27 u
= 27 x 7
= 189
Answer(s): 189
