<image>As shown in the figure, on a rectangular ground with a length of 22 meters and a width of 17 meters, two perpendicular roads of the same width are to be built (each road parallel to one side of the rectangle). The remaining area will be covered with lawn, making the lawn area 300 square meters. If the width of the roads is x meters, then according to the problem a corresponding equation can be formed as __________. 