Kylie and Gabby had an equal number of coins at first. Kylie used
15 of her coins and Gabby used
18 of her coins. They used 52 coins altogether. How many coins did Gabby have in the end?
|
Kylie |
Gabby |
Before |
5x8 = 40 u |
8x5 = 40 u |
Change |
- 1x8 = - 8 u |
- 1x5 = - 5 u |
After |
4x8 = 32 u |
7x5 = 35 u |
The number of coins that Kylie and Gabby each had at first is the same. Make the number of coins that Kylie and Gabby each had at first the same. LCM of 5 and 8 is 40.
Number of coins that Kylie and Gabby used
= 8 u + 5 u
= 13 u
13 u = 52
1 u = 52 ÷ 13 = 4
Number of coins that Gabby had in the end
= 35 u
= 35 x 4
= 140
Answer(s): 140