Albert had some coins at first. After he bought another 80 coins, he had five times as many coins as before. How many coins did Albert have at first?
| |
Coins |
| Before |
1 u |
| Change |
+ 80 |
| After |
1 u + 80 = 5 u |
Number of coins after he bought = 1 u + 80
Number of coins that is five times as many coins as before = 5 x 1 u = 5 u
5 u = 1 u + 80
5 u - 1 u = 80
4 u = 80
1 u = 80 ÷ 4 = 20
Number of stickers that Kim had at first
= 1 u
= 20
Answer(s): 20
