West high school has 250 students less than twice the population of east high school. both schools have a total of 2858 students. how many attend east high school

The the number of students attending West High School can be expressed in terms of x as:
2x - 250
The total number of students in the two schools is x + 2x - 250
As the total is 2858, we have
x + 2x - 250 = 2858
Solving for x, we have
3x - 250 = 2858
3x = 3108
x = 1036
So the number of students attending East High School is 1036.
The number of students attending West High School can be found by substituting x = 1036 into 2x - 250. 
2x - 250 = 2*1036 - 250 = 1822
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