Cole had
310 as many pens as Jade. After Cole bought another 58 pens, he had 19 less pens than Jade. How many pens did Cole have at first?
|
Cole |
Jade |
Before |
3 u |
10 u |
Change |
+ 58 |
|
After |
3 u + 58 |
10 u |
Jade had 19 more pens than Cole in the end. So, if Cole had another 19 pens, he would have the same number of pens as Jade.
10 u = 3 u + 58 + 19
10 u - 3 u = 58 + 19
7 u = 77
1 u = 77 ÷ 7 = 11
Number of pens that Cole had at first
= 3 u
= 3 x 11
= 33
Answer: 33