Albert had some coins at first. After he bought another 50 coins, he had six times as many coins as before. How many coins did Albert have at first?
| |
Coins |
| Before |
1 u |
| Change |
+ 50 |
| After |
1 u + 50 = 6 u |
Number of coins after he bought = 1 u + 50
Number of coins that is six times as many coins as before = 6 x 1 u = 6 u
6 u = 1 u + 50
6 u - 1 u = 50
5 u = 50
1 u = 50 ÷ 5 = 10
Number of stickers that Kim had at first
= 1 u
= 10
Answer(s): 10
