Question

answer the question if u can

Answer 1

let the number of students=x
so 540/x

if 30 were more
so 540/x+30

so 
540/x -  540/x+30=3
1620/x2  +     30x=3
1620= 3x2+90x
540=x2+30x
x2+30x-540=0
x2+90x-60x-540=0
x(x+90)-60(x+90)
so x=60

so the number of students=60