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Sixth grade mathematics Huanggang small champion book 2
There are x participants in middle school and y participants in high school.

Then (braces) 2x+3=y

y-4=x+4

The solution is (braces) x=5.

y= 13

A: There were five people who participated in the "My Motherland" speech contest in middle school.

Originally, there were 13 people who participated in the speech contest of "The Motherland is in My Heart" for senior students.