Write a linear equation

Question

A school district purchases a high-volume printer, copier, and scanner for $39,000. After 10 years, the equipment will have to be replaced. Its value at that time is expected to be $1800. Write a linear equation giving the value V of the equipment during the 10 years it will be in use

Answer 1

In the 10 years the printer loses $37,200 (39000 - 1800)

That is $3720 per year. 

y represetts the number of years.

v = 39000 - 3720y