Question

Need formula for this word problem. Help please

Answer 1

Jim bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $400 less than the desktop. He paid for the computers using two different financing plans. For the desktop the interest rate was 8.5% per year, and for the laptop it was 5% per year. The total finance charges for one year were $412. How much did each computer cost before finance charges?

Desktop-$ _____
Laptop-$_______

Answer 2

Say, the cost of desktop and laptop before finance charges are : \(d\) and \)l
You need to setup two equations based on given info and solve them

`Before finance charges, the laptop cost $400 less than the desktop.` :
\[l=d-400\tag{1}\]
` For the desktop the interest rate was 8.5% per year, and for the laptop it was 5% per year. The total finance charges for one year were $412.` :
\[0.085d+0.05l=412\tag{2}\]

see if you can solve them

Answer 3

D = 86400/27 = $3200
then L = 3200-400 = $2800

Answer 4

Those are the answers right?

Answer 5

Looks perfect!

Answer 6

okay thanks

Answer 7

yw