Ryan had 4 times as many pink pencils as black pencils. After giving away 2 pink pencils and buying another 34 black pencils, he had an equal number of pink and black pencils. How many pink pencils did Ryan have at first?
| |
Pink pencils |
Black pencils |
| Before |
4 u |
1 u |
| Change |
- 2 |
+ 34 |
| After |
4 u - 2 |
1 u + 34 |
The number of pink and black pencils is the same in the end.
4 u - 2 = 1 u + 34
4 u - 1 u = 34 + 2
3 u = 2 + 34
3 u = 36
1 u = 36 ÷ 3 = 12
Number of pink pencils that Ryan had at first
= 4 u
= 4 x 12
= 48
Answer(s): 48
