Nick had
310 as many erasers as Jade. After Nick bought another 36 erasers, he had 13 less erasers than Jade. How many erasers did Nick have at first?
|
Nick |
Jade |
Before |
3 u |
10 u |
Change |
+ 36 |
|
After |
3 u + 36 |
10 u |
Jade had 13 more erasers than Nick in the end. So, if Nick had another 13 erasers, he would have the same number of erasers as Jade.
10 u = 3 u + 36 + 13
10 u - 3 u = 36 + 13
7 u = 49
1 u = 49 ÷ 7 = 7
Number of erasers that Nick had at first
= 3 u
= 3 x 7
= 21
Answer: 21