There are 26 times in Washington high school as teachers. when all the teachers and students are seated in the 900 seat school auditorium, only 9 seats are unoccupied. how many students are at Washington highschool

So, I assume that you mean 26 students times the teachers.

You can create two equations out of this information.

s = students while t = teachers

26t = s

900 - 9 = 891 seats being occupied

s + t = 891

You can use these two equations for substitution.

s = 891 - t

26t = 891 - t

27t = 891

t = 31

So, 31 teachers. Now plug that back into an original equation.

s + (31) = 891

s = 860

860 students.