SOLUTION: A frame that measures 12 inches by 9 inches is of uniform width. The area of the picture inside is 18 square inches. What is the width of the frame?

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Question 1166547: A frame that measures 12 inches by 9 inches is of uniform width. The area of the picture inside is 18 square inches. What is the width of the frame?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!

w, the uniform width
%2812-2w%29%289-2w%29=12%2A9-18-------------area of just the frame
Simplify and solve for w.