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.