There was an equal number of red and silver marbles in a packet at first. After 29 silver marbles were taken out and 43 red marbles were added into the packet, there was
15 as many silver marbles as red marbles. Find the number of silver marbles in the packet at first.
|
Red marbles |
Silver marbles |
Before |
5 u - 43 |
1 u + 29 |
Change |
+ 43 |
- 29 |
After |
5 u |
1 u |
The number of red and silver marbles in the packet is the same at first.
5 u - 43 = 1 u + 29
5 u - 1 u = 29 + 43
4 u = 72
1 u = 72 ÷ 4 = 18
Number of silver marbles at first
= 1 u + 29
= 18 + 29
= 47
Answer(s)47