Jessica bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $250 less than the desktop. She paid for the computers using two different financing plans. For the desktop the interest rate was 7% per year, and for the laptop it was 8% per year. The total finance charges for one year were $325. How much did each computer cost before finance charges

Let desktop cost = x

Let laptop cost = x - 250

According to equation:

(x*7)/100 + (x-250)*8/100 = 325

7x + 8x - 2000 = 32500

15x = 32500+2000

15x = 34500

x = 2300

Desktop cost before finance charge = $2,300

Laptop cost before finance charge = $2,050 ($2,300-$250)

hi : ) i found this so i hope this !

"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"