There was an equal number of blue and green marbles in a packet at first. After 18 green marbles were taken out and 46 blue marbles were added into the packet, there was
15 as many green marbles as blue marbles. Find the number of green marbles in the packet at first.
|
Blue marbles |
Green marbles |
Before |
5 u - 46 |
1 u + 18 |
Change |
+ 46 |
- 18 |
After |
5 u |
1 u |
The number of blue and green marbles in the packet is the same at first.
5 u - 46 = 1 u + 18
5 u - 1 u = 18 + 46
4 u = 64
1 u = 64 ÷ 4 = 16
Number of green marbles at first
= 1 u + 18
= 16 + 18
= 34
Answer(s)34