Good student for spring outing 10, * * * a few dollars, plus two more students. The original planned expenses remain unchanged, and each person can share less 3 yuan. How much does everyone have to pay?

Solution: If each person needs to pay X yuan, then after adding 2 people, each person needs to pay 12(x-3) yuan. According to the meaning of the question:

10x= 12(x-3)

If there are no brackets, you get 10x= 12x-36.

If you move this item, you will get 10x- 12x=-36.

Combine similar items and get -2x=-36.

The coefficient is 1 and x= 18.

A: Everyone should pay 18 yuan.