If the sum of all the forces is zero, find the magnitude of the unknown forces X and Y - ___53 X 90 10

Find the magnitude of the resultant of shown forces :-

Find the magnitude of the unknown forces X and Y if sum of all forces is zero.

Find the magnitude of the unknown forces X and Y if sum of all forces is zero.

Find the magnitude of the unknown forces if sum of all forces is zero.

Moment of concurrent forces about any point is constant. If vector sum of all concurrent forces is zero, then moment of all the forces about any point is also zero.

Moment of concurrent forces about any point is constant. If vector sum of all concurrent forces is zero, then moment of all the forces about any point is also zero.

The sum of the magnitudes of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90^(@) with the force of smaller magnitude, What are the magnitudes of forces?