Justin had
38 as many erasers as Erika. After Justin gave away 77 erasers, he had 92 less erasers than Erika. How many erasers did Erika have?
| |
Justin |
Erika |
| Before |
3 u |
8 u |
| Change |
- 77 |
|
| After |
3 u - 77 |
8 u |
Erika had 92 more erasers than Justin in the end. So, if Justin had another 92 erasers, he would have the same number of erasers as Erika.
8 u = 3 u - 77 + 92
8 u - 3 u = 92 - 77
5 u = 15
1 u = 15 ÷ 5 = 3
Number of erasers that Erika had at first
= 8 u
= 8 x 3
= 24
Answer: 24
