Problema Solution
kala baught a desktop computer and a laptop computer. before finance charges the laptop cost $250 less than the desktop. the desktop interest rate is 7% per year and the laptop is 8% per year. the total finance charge for one year was $325. how much did each computer cost before finance charges?
Answer provided by our tutors
Let x, y be the costs of desktop computer and a laptop computer.
y=x-250.
0.07x+0.08x=325.
0.07x+0.08(x-250)=325.
0.07x+0.08x-20=325.
0.15x=345.
x=345/0.15.
=$2300.00
y=2300-250.
=$205.00