At the factory, Storey F and Storey G had an equal number of machines at first. If 7 machines were removed from Storey G and 7 times as many machines were removed from Storey F as Storey G, the number of machines in Storey G would be 3 times as many as in Storey F. Find the number of machines on each storey.
| |
Storey F |
Storey G |
| Before |
1 u + 49 |
3 u + 7 |
| Change |
- 49 |
- 7 |
| After |
1 u |
3 u |
Number of machines removed from Storey F
= 7 x 7
= 49
Number of machines on Storey F and Storey G at first is the same.
3 u + 7 = 1 u + 49
3 u - 1 u = 49 - 7
2 u = 42
1 u = 42 ÷ 2 = 21
Number of machines on each storey
= 1 u + 49
= 21 + 49
= 70
Answer(s): 70
