Question

A retailer planned to buy some computers from a total of sh 1800000. Before the retailer could buy the computers the price per unit was reduced by sh 4000. This reduction in price enabled the retailer to buy five more computers using the same amount of money as originally planned. Determine the number of computers the retailer bought.​

Answer 1

Answer:

50 computers

Step-by-step explanation:

After reduction, he bought x computers hence price per unit was 1800000/x

Before reduction, price per unit was 1800000/(x-5)

The difference in the price is 4000 hence

$\frac {1800000}{x}-\frac {1800000}{x-5}=4000\\4x^{2}-20x+9000=0\\x^{2}-5x+2250=0\\(x+45)(x-50)=0\\x=50 or -45$

Therefore, x=50