with the use of the hubble space telescope, scientists recently discovered a giant runway star. it is 90 times larger than the sun and is very hot and blue-white in color. why does the sun appear to be brighter than this runway star when viewed from the earth?

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move. 

Make them both to where they have the denominator of 18that makes 3/2 equal 27/18 and 1/9 equal 2/18so now you have  27/18x+5=2/18subtract 5 from the other sideso now you have 27/18x+2/18-5then subtract 2/18 from 27/18 to get 25/18x=-5then divide 25/18 by -5 and your answer will be  -5/18