a rectangular photograph is surrounded by a border that is 1 inch wide on each side . the total area of the photograph and the border is m square inches . if the border had been 7 inches wide on each side , the total area would have been ( m + 264 ) square inches . what is the perimeter of the photograph , in inches ?
"let x and y be the width and length of the photograph . ( x + 2 ) ( y + 2 ) = m and so ( 1 ) xy + 2 x + 2 y + 4 = m ( x + 14 ) ( y + 14 ) = m and so ( 2 ) xy + 14 x + 14 y + 196 = m + 264 let ' s subtract equation ( 1 ) from equation ( 2 ) . 12 x + 12 y + 192 = 264 2 x + 2 y = 12 , which is the perimeter of the photograph . the answer is b ."
divide(subtract(264, subtract(power(multiply(7, const_2), const_2), power(multiply(1, const_2), const_2))), const_2)