Traditional Culture Encyclopedia - Photography major - A school organizes an art photography exhibition, and the requirements for the submitted works are as follows: seven-inch photos (7 inches long and 5 inches wide); Stick the photo on the front of the

A school organizes an art photography exhibition, and the requirements for the submitted works are as follows: seven-inch photos (7 inches long and 5 inches wide); Stick the photo on the front of the

A school organizes an art photography exhibition, and the requirements for the submitted works are as follows: seven-inch photos (7 inches long and 5 inches wide); Stick the photo on the front of the rectangular backing paper. Let the width of the backing paper exposed around the photo be x inches, according to the meaning of the question: (7+2x)(5+2x)=3×7×5,

So choose D.