Question 1155663
d, the uniform width of the stained glass frame
3, side length of the square mirror
91 sq. in., area of the stained glass frame only


{{{(3+2d)^2}}}, the total area of the frame and the mirror
-
{{{3^2=9}}}, area of just the mirror
-
{{{highlight_green((3+2d)^2-9=91)}}}-------------simplify and solve this for d.