There was an equal number of pink and blue beads in a box at first. After 21 blue beads were taken out and 29 pink beads were added into the box, there was
16 as many blue beads as pink beads. Find the number of blue beads in the box at first.
| |
Pink beads |
Blue beads |
| Before |
6 u - 29 |
1 u + 21 |
| Change |
+ 29 |
- 21 |
| After |
6 u |
1 u |
The number of pink and blue beads in the box is the same at first.
6 u - 29 = 1 u + 21
6 u - 1 u = 21 + 29
5 u = 50
1 u = 50 ÷ 5 = 10
Number of blue beads at first
= 1 u + 21
= 10 + 21
= 31
Answer(s)31
