2x+5=4x- 1 1

2x= 16

x=8

A: There are eight children.

You can also do this:

This is a profit and loss problem, the application: (profit+loss) ÷ the difference of each distribution = the number of people allocated.

(5+ 1 1)÷(4-2)=8 people.

2×8+5=2 1 apple