There was an equal number of yellow and silver beads in a bag at first. After 20 silver beads were taken out and 48 yellow beads were added into the bag, there was
13 as many silver beads as yellow beads. Find the number of silver beads in the bag at first.
| |
Yellow beads |
Silver beads |
| Before |
3 u - 48 |
1 u + 20 |
| Change |
+ 48 |
- 20 |
| After |
3 u |
1 u |
The number of yellow and silver beads in the bag is the same at first.
3 u - 48 = 1 u + 20
3 u - 1 u = 20 + 48
2 u = 68
1 u = 68 ÷ 2 = 34
Number of silver beads at first
= 1 u + 20
= 34 + 20
= 54
Answer(s)54
