Roshel had 13 more tarts than Mary at first. After Roshel ate 5 tarts, she had five times as many tarts as Mary in the end. How many tarts did Mary have?
| |
Mary |
Roshel |
| Before |
1 u |
1 u + 13 |
| Change |
|
- 5 |
| After |
1 u |
1 u + 8 |
Comparing Mary
and Roshel in the end |
1 u |
5 u |
The number of tarts that Mary had remains unchanged.
Number of tarts that Roshel had in the end
= 5 x 1 u
= 5 u
5 u = 1 u + 8
5 u - 1 u = 8
4 u = 8
1 u = 8 ÷ 4 = 2
Number of tarts that Mary had
= 1 u
= 2
Answer(s): 2
