Roshel has some coins. She has 10 less coins in Box B than in Box C. After 20 coins were transferred from Box C to Box B, there were 100 coins in Box C.
- How many coins were there in Box C at first?
- How many coins were there in Box B in the end?
|
Box B |
Box C |
Before |
1 u |
1 u + 10 |
Change |
+ 20 |
- 20 |
After |
1 u + 20 |
100 |
(a)
Number of coins in Box C at first
= 100 + 20
= 120
(b)
Number of coins in Box B at first
= 120 - 10
= 110
Number of coins in Box B in the end
= 110 + 20
= 130
Answer(s): (a) 120; (b) 130