Reuben bought a desktop computer and a laptop computer. before finance charges, the laptop cost $300 less than the desktop. he paid for the computers using two different financing plans. for the desktop the interest rate was 6% per year, and for the laptop it was 7% per year. the total finance charges for one year were $252. how much did each computer cost before finance charges?

The cost of desktop is and the laptop is

Solution:

Let us assume the desktop cost and laptop costs

Now, the laptop cost $300 less than the desktop,

So, ………… (i)

Again the desktop the interest rate was per year = 0.06x

For the laptop it was per year = 0.07y

The total finance charges for one year were

So,  

(value from (i))

Hence

The desktop costs and the laptop costs

step-by-step explanation:

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