A total of 33 teachers and students went to plant trees, a total of 120 trees, 10 trees for each teacher, 4 trees for each boy and 2 trees for each girl How many people did the teacher go to?

There are X students and 33-2x teachers
4X+2X+10(33-2X)=120
4X+2X+330-20X=120
14X=210
X=15
Teachers = 30-15 * 2 = 3

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