Roshel and Gabby had an equal number of cards at first. Roshel used
13 of her cards and Gabby used
110 of her cards. They used 26 cards altogether. How many cards did Gabby have in the end?
| |
Roshel |
Gabby |
| Before |
3x10 =
30 u |
10x3 =
30 u |
| Change |
- 1x10 =
- 10 u |
- 1x3 =
- 3 u |
| After |
2x10 =
20 u |
9x3 =
27 u |
The number of cards that Roshel and Gabby each had at first is the same. Make the number of cards that Roshel and Gabby each had at first the same. LCM of 3 and 10 is 30.
Number of cards that Roshel and Gabby used
= 10 u + 3 u
= 13 u
13 u = 26
1 u = 26 ÷ 13 = 2
Number of cards that Gabby had in the end
= 27 u
= 27 x 2
= 54
Answer(s): 54
