Xiao Chen and his teacher have compiled a textbook and are going to print it into a manuscript. According to the space estimate, it takes four hours for the teacher to type alone, while Xiao Chen needs to type alone. You can think of the total amount of work as "1", then the work efficiency of teachers is 1/4, and that of children is 1/6.

Solution: If it takes X hours to finish, then the teacher's working time is X hours and the child's working time is (X+ 1) hours.

According to the total workload of teachers+children = 1, list the equation:

1/4X+ 1/6(X+ 1)= 1