A particle is restricted to the line through the centers of the earth and the moon. Calculate the distance D (km) from the center of the earth at which a particle experiences equal attraction from the...

Please Solve this problem and show the written solution. Thank you

Extracted text: A particle is restricted to the line through the centers of the earth and the moon. Calculate the distance D (km) from the center of the earth at which a particle experiences equal attraction from the earth and from the moon.