Brandon had
35 as many pens as Kimberly. After Brandon bought another 12 pens, he had 20 less pens than Kimberly. How many pens did Brandon have at first?
| |
Brandon |
Kimberly |
| Before |
3 u |
5 u |
| Change |
+ 12 |
|
| After |
3 u + 12 |
5 u |
Kimberly had 20 more pens than Brandon in the end. So, if Brandon had another 20 pens, he would have the same number of pens as Kimberly.
5 u = 3 u + 12 + 20
5 u - 3 u = 12 + 20
2 u = 32
1 u = 32 ÷ 2 = 16
Number of pens that Brandon had at first
= 3 u
= 3 x 16
= 48
Answer: 48
