Xuan had 198 marbles. Seth had 23 of what Xuan had. After Xuan used some of his marbles and Seth used 12 of his marbles, Xuan had 13 as many marbles left as Seth.
- How many marbles did Seth have at first?
- How many marbles did Xuan use?
|
Xuan |
Seth |
Before |
198 |
132 |
Change |
- ? |
- 66 |
After |
22 |
66 |
(a)
Number of marbles that Seth had at first
=
23 x 198
= 132
(b)
Number of marbles that Seth used
=
12 x 132
= 66
Number of marbles that Seth had left
= 132 - 66
= 66
Number of marbles that Xuan had left
=
13 x 66
= 22
Number of marbles that Xuan used
= 198 - 22
= 176
Answer(s): (a) 132; (b) 176