At first, Warren had 127 more silver beads than green beads in a box. Each day, he took out 10 silver beads and 5 green beads from the box. After some time, he only had 23 green beads left in the box.
- How many beads did Warren take out from the box altogether?
- How many green beads did Warren have at first?
| |
Silver beads |
Green beads |
Comparing silver beads
and green beads at first |
127 more |
|
| Before |
10 u |
5 u + 23 |
| Change |
- 10 u |
- 5 u |
| After |
0 |
23 |
(a)
If another 127 green beads are added into the box at first, the number of silver and green beads will be the same.
10 u = 5 u + 23 + 127
10 u - 5 u = 23 + 127
5 u = 150
1 u = 150 ÷ 5 = 30
Number of beads that Warren took out
= 10 u + 5 u
= 15 u
= 15 x 30
= 450
(b)
Number of beads that Warren had at first
= 450 + 23
= 473
Answer(s): (a) 450; (b) 473
