Question Find the width of the matte for a $20 \mathrm{~cm} \times 30 \mathrm{~cm}$ picture frame, given the matte area equals the picture area.

Studdy Solution
The exact width of the matte is $x = 12.5 + 2.5\sqrt{13}$ cm.
The width of the matte is $12.5 + 2.5\sqrt{13}$ centimeters.