<image>Write equations to solve the following problems.
(1) By 2015, the total length of Nanjing Metro lines was approximately 300 kilometers, which is 48 kilometers less than 4 times the total length in 2012. What was the approximate total length of the lines in 2012?
(2) Wang Jun and Li Hong started from two locations 840 meters apart at the same time, moving in the same direction. Wang Jun caught up with Li Hong after 24 minutes. If Li Hong's speed is 55 meters per minute, what is Wang Jun's speed in meters per minute?
