There was an equal number of black and silver beads in a bag at first. After 17 silver beads were taken out and 35 black beads were added into the bag, there was
15 as many silver beads as black beads. Find the number of silver beads in the bag at first.
|
Black beads |
Silver beads |
Before |
5 u - 35 |
1 u + 17 |
Change |
+ 35 |
- 17 |
After |
5 u |
1 u |
The number of black and silver beads in the bag is the same at first.
5 u - 35 = 1 u + 17
5 u - 1 u = 17 + 35
4 u = 52
1 u = 52 ÷ 4 = 13
Number of silver beads at first
= 1 u + 17
= 13 + 17
= 30
Answer(s)30