Sabrina and Winnie had an equal number of marbles at first. Sabrina used
14 of her marbles and Winnie used
17 of her marbles. They used 88 marbles altogether. How many marbles did Winnie have in the end?
|
Sabrina |
Winnie |
Before |
4x7 = 28 u |
7x4 = 28 u |
Change |
- 1x7 = - 7 u |
- 1x4 = - 4 u |
After |
3x7 = 21 u |
6x4 = 24 u |
The number of marbles that Sabrina and Winnie each had at first is the same. Make the number of marbles that Sabrina and Winnie each had at first the same. LCM of 4 and 7 is 28.
Number of marbles that Sabrina and Winnie used
= 7 u + 4 u
= 11 u
11 u = 88
1 u = 88 ÷ 11 = 8
Number of marbles that Winnie had in the end
= 24 u
= 24 x 8
= 192
Answer(s): 192