Jack had
59 as many erasers as Xandra. After Jack bought another 48 erasers, he had 16 less erasers than Xandra. How many erasers did Jack have at first?
| |
Jack |
Xandra |
| Before |
5 u |
9 u |
| Change |
+ 48 |
|
| After |
5 u + 48 |
9 u |
Xandra had 16 more erasers than Jack in the end. So, if Jack had another 16 erasers, he would have the same number of erasers as Xandra.
9 u = 5 u + 48 + 16
9 u - 5 u = 48 + 16
4 u = 64
1 u = 64 ÷ 4 = 16
Number of erasers that Jack had at first
= 5 u
= 5 x 16
= 80
Answer: 80
