SOLUTION: in a certain school, 40% of all students are 8 yrs old or younger. the number of remaining students is 120. how many students are 8 yrs old or younger?

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Question 628185: in a certain school, 40% of all students are 8 yrs old or younger. the number of remaining students is 120. how many students are 8 yrs old or younger?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = total number of students in school
given:
+.4x+ are 8 yrs old or younger
+x+-+.4x+=+120+
+.6x+=+120+
+x+=+200+
+.4x+=+.4%2A200+
+.4x+=+80+
There are 80 students who are 8 yrs old or younger