Question 1111977: Ivanna bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $450 more than the desktop. She paid for the computers using two different financing plans. For the desktop the interest rate was 9% per year, and for the laptop it was 6% per year. The total finance charges for one year were $300. How much did each computer cost before finance charges?
Desktop:____
Laptop:_____
Answer by mananth(16946)   (Show Source):
You can put this solution on YOUR website! Ivanna bought a desktop computer and a laptop computer.
the laptop cost $450 more than the desktop.
desktop price be x
laptop price (x+450)
For the desktop the interest rate was 9% per year,
Interest = 9%x
and for the laptop it was 6% per year.
Interest = 6%(x+450)
The total finance charges for one year were $300.
9%x + 6%(x+450) = 300
9x+6(x+450) = 300*100
9x+6x +2700=30000
15x= 30000-2700
15x=27300
x= 1820
You complete the problem
Desktop:____
Laptop:_____
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