This problem requires masses, distances, and other constants that can be found in Appendix C of the text. (a) Calculate the magnitude of the acceleration due to gravity on the surface of Earth (in m/s2) due to the Moon.

As newton's first law states a object in motion stays in motion

Ithink it is c ,i hope i you

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