There were 54 students in Macun Middle School last year, twice as many as Niuzhuang Primary School. This school year, Macun Middle School.

Solution: Last year there were X students in Mazhuang Middle School and Y students in Niuzhuang Primary School.

Then the column equation has x=2y+54.

x+20=(y+ 14)*4-26

system of simultaneous equations

Solution: x=98

y=22

A: Last year, there were 98 students in Mazhuang Middle School and 22 students in Niuzhuang Primary School.

Answering questions is not easy, hope to adopt!