Jack had
59 as many erasers as Kylie. After Jack bought another 60 erasers, he had 12 less erasers than Kylie. How many erasers did Jack have at first?
| |
Jack |
Kylie |
| Before |
5 u |
9 u |
| Change |
+ 60 |
|
| After |
5 u + 60 |
9 u |
Kylie had 12 more erasers than Jack in the end. So, if Jack had another 12 erasers, he would have the same number of erasers as Kylie.
9 u = 5 u + 60 + 12
9 u - 5 u = 60 + 12
4 u = 72
1 u = 72 ÷ 4 = 18
Number of erasers that Jack had at first
= 5 u
= 5 x 18
= 90
Answer: 90
