There was an equal number of silver and red beads in a bag at first. After 21 red beads were taken out and 34 silver beads were added into the bag, there was
16 as many red beads as silver beads. Find the number of red beads in the bag at first.
| |
Silver beads |
Red beads |
| Before |
6 u - 34 |
1 u + 21 |
| Change |
+ 34 |
- 21 |
| After |
6 u |
1 u |
The number of silver and red beads in the bag is the same at first.
6 u - 34 = 1 u + 21
6 u - 1 u = 21 + 34
5 u = 55
1 u = 55 ÷ 5 = 11
Number of red beads at first
= 1 u + 21
= 11 + 21
= 32
Answer(s)32
