Tommy had some buttons at first. After he bought another 66 buttons, he had seven times as many buttons as before. How many buttons did Tommy have at first?
| |
Buttons |
| Before |
1 u |
| Change |
+ 66 |
| After |
1 u + 66 = 7 u |
Number of buttons after he bought = 1 u + 66
Number of buttons that is seven times as many buttons as before = 7 x 1 u = 7 u
7 u = 1 u + 66
7 u - 1 u = 66
6 u = 66
1 u = 66 ÷ 6 = 11
Number of stickers that Kim had at first
= 1 u
= 11
Answer(s): 11
