$\"\"$

The cost of new equipment is $\"\"$ .

The value depreciates by $\"\"$ every year.

Every year the value of the equipment deprecited by $\"\"$ means the cost of the equipment after $\"\"$ year is $\"\"$ .

After $\"\"$ years, the value of the equipment is $\"\"$ of the amount after $\"\"$ year.

Hence after $\"\"$ years, the value of the equipment is $\"\"$ .

Find the value of the equipment after $\"\"$ years.

Substitute $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ .

Cost of the equipment is $\"\"$ .

$\"\"$

Cost of the equipment is $\"\"$ .