Yesterday, Peter had 18 more coins than Mark. Today, Peter gave Mark
59 of his coins. As a result, he has half as many coins as Mark now. How many coins did Peter have yesterday?
|
Peter |
Mark |
More |
Before |
9 u |
3 u |
6 u |
Change |
- 5 u |
+ 5 u |
|
After |
4 u |
8 u |
|
Comparing Peter and Mark in the end |
1
|
2
|
|
Number of coins that Mark has now
= 2 x 4 u
= 8 u
Number of coins that Peter had more than Mark yesterday
= 9 u - 3 u
= 6 u
6 u = 18
1 u = 18 ÷ 6 = 3
Number of coins that Peter had yesterday
= 9 u
= 9 x 3
= 27
Answer(s): 27