Last week, Peter had a total of 211 yellow and pink pencils. Two weeks later, he sold
23 of all the yellow pencils and 15 pink pencils. Now he has the same number of yellow and pink pencils. How many pencils does he have in the end?
| |
Yellow |
Pink |
Total |
| Before |
3 u |
1 u + 15 |
4 u + 15 |
| Change |
- 2 u |
- 15 |
|
| After |
1 u |
1 u |
|
Comparing the yellow
and pink pencils in the end |
1 |
1 |
|
Total number of pencils at first
= 3 u + 1 u + 15
= 4 u + 15
4 u + 15 = 211
4 u = 211 - 15
4 u = 196
1 u = 196 ÷ 4 = 49
Number of pencils that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 49
= 98
Answer(s): 98
