Pooky eats three cans of cat food each day. HTwo construction companies, Big Time Builders and Goldstar Construction, are building tunnels for a city. It takes Big Time Builders 4 weeks to build 84 meters of tunnel. This equation describes how fast Goldstar Construction builds tunnels, where y represents the length of tunnel it builds in meters and x represents the number of weeks it takes. ow long will 27 cans of food last?