X+Z=3600
X=(X+Y+Z)/3
Z=(X+Y)/5
Solution: X=2400 Y=3600 Z= 1200.
2.X= product price (revenue) Y= equipment cost (expenditure)
X*0.03+Y*0.02=264
X-Y-264=0
Solution: X=5386 Y=5 122.
The number in the second question is not an integer.