Ian had some stamps at first. After he bought another 66 stamps, he had four times as many stamps as before. How many stamps did Ian have at first?
| |
Stamps |
| Before |
1 u |
| Change |
+ 66 |
| After |
1 u + 66 = 4 u |
Number of stamps after he bought = 1 u + 66
Number of stamps that is four times as many stamps as before = 4 x 1 u = 4 u
4 u = 1 u + 66
4 u - 1 u = 66
3 u = 66
1 u = 66 ÷ 3 = 22
Number of stickers that Kim had at first
= 1 u
= 22
Answer(s): 22
