How do i get the answer to 3 divided by _ equals 36

What is the measure of x, in degrees

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Joe had 25 pencils he divided them into 5 pieces how many pieces does he have left