There was an equal number of red and white beads in a packet at first. After 15 white beads were taken out and 45 red beads were added into the packet, there was
14 as many white beads as red beads. Find the number of white beads in the packet at first.
| |
Red beads |
White beads |
| Before |
4 u - 45 |
1 u + 15 |
| Change |
+ 45 |
- 15 |
| After |
4 u |
1 u |
The number of red and white beads in the packet is the same at first.
4 u - 45 = 1 u + 15
4 u - 1 u = 15 + 45
3 u = 60
1 u = 60 ÷ 3 = 20
Number of white beads at first
= 1 u + 15
= 20 + 15
= 35
Answer(s)35
