Hi, I'm having problems on how to setup this problem. Would appreciate any help.

A gutter is to be made by folding up the edges of a strip of metal. If the metal is 12 in wide and the cross-sectional area of the gutter is to be 16 7/8 in sq, what are the width and depth of the gutter.

I understand that the length of the one side is 12-2x, but I don't know how this helps me.

Thanks

Ryan