SOLUTION: I need help with this problem. It has already been worked and is the archives, but I am not able to come up with the answer. Please help me!!! A print is 10 cm longer than it

Question 545595: I need help with this problem. It has already been worked and is the archives, but I am not able to come up with the answer. Please help me!!!
A print is 10 cm longer than it is wide. It is mounted in a frame 1.5 cm wide. The area of the frame is 399 cm^2. Find the dimensions of the print.
Please help!!!!
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
the dimensions of the frame are (w + 3) and (w + 13); the product of these is the area of the frame plus the print

the dimensions of the print are (w) and (w + 10)

the difference of the areas is 399

[(w + 3)(w + 13)] - [(w)(w + 10)] = 399 ___ it's not a quadratic because the w^2 terms subtract
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