SOLUTION: A picture frame is 30 cm by 24 cm. There are 520 cm^2 of picture showing. Find the width of the frame.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: A picture frame is 30 cm by 24 cm. There are 520 cm^2 of picture showing. Find the width of the frame.      Log On


   

Question 1181007: A picture frame is 30 cm by 24 cm. There are 520 cm^2 of picture showing. Find the width of the frame.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x, frame's width from inner to outer edges

%2830-2x%29%2824-2x%29=520
-
%2815-x%29%2812-x%29=130
continue any way you want to. Can you find two whole numbered factors of 130 which differ by 3?