SOLUTION: A photograph measuring 10cm by 15cm is to be framed with a border of uniform width surrounding the photograph. The area of the border is to be twice the area of the photo. Determin

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Question 1138601: A photograph measuring 10cm by 15cm is to be framed with a border of uniform width surrounding the photograph. The area of the border is to be twice the area of the photo. Determine the width of the border. Define your variable.
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
The area of border plus photo is 2%2A10%2A15%2Acm%5E2.

x, uniform width border
%2810%2B2x%29%2815%2B2x%29=2%2A10%2A15
Simplify and solve.