SOLUTION: Ryan bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $450 more than the desktop. He paid for the computers using two different financing pl

Algebra ->  Customizable Word Problem Solvers  -> Finance -> SOLUTION: Ryan bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $450 more than the desktop. He paid for the computers using two different financing pl      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1200646: Ryan bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $450 more than the desktop. He 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?
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.

x dollars for the desktop;  (x+450) dollars for the laptop.


Write one year total finance charges equation 

    0.09*x + 0.06*(x+450) = 300  dollars.


Simplify and find x.


etc.

The rest is simple arithmetic.

------------------

To see many other similar solved problems using one equation in one unknown,  look into the lesson
    - Typical investment problems
in this site.

To see many other similar solved problems using systems of two equations in two unknowns,  look into the lesson
    - Using systems of equations to solve problems on investment
in this site.