Final answer:
The couch will move in the direction of the larger force being applied, which is the side of the person pushing with a force of 4 N.
Step-by-step explanation:
When two people push a couch from opposite sides with forces of 2 N and 4 N respectively, the couch will move in the direction of the larger force. In this instance, the person applying the 4 N force will cause the couch to move in their direction, assuming no other forces are at play (like friction from the floor or additional forces from other directions). The movement can be predicted using Newton's Second Law of Motion, which states that the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass.