Linda and Raeann had an equal number of pens at first. Linda used
12 of her pens and Raeann used
18 of her pens. They used 10 pens altogether. How many pens did Raeann have in the end?
|
Linda |
Raeann |
Before |
2x4 = 8 u |
8x1 = 8 u |
Change |
- 1x4 = - 4 u |
- 1x1 = - 1 u |
After |
1x4 = 4 u |
7x1 = 7 u |
The number of pens that Linda and Raeann each had at first is the same. Make the number of pens that Linda and Raeann each had at first the same. LCM of 2 and 8 is 8.
Number of pens that Linda and Raeann used
= 4 u + 1 u
= 5 u
5 u = 10
1 u = 10 ÷ 5 = 2
Number of pens that Raeann had in the end
= 7 u
= 7 x 2
= 14
Answer(s): 14