Andy had some beads at first. After he bought another 56 beads, he had thrice as many beads as before. How many beads did Andy have at first?
| |
Beads |
| Before |
1 u |
| Change |
+ 56 |
| After |
1 u + 56 = 3 u |
Number of beads after he bought = 1 u + 56
Number of beads that is thrice as many beads as before = 3 x 1 u = 3 u
3 u = 1 u + 56
3 u - 1 u = 56
2 u = 56
1 u = 56 ÷ 2 = 28
Number of stickers that Kim had at first
= 1 u
= 28
Answer(s): 28
