The system Px + Qy = R has the solution (3,-1), where F, G, H, P, Q, and Fx + Gy = H
R are nonzero real numbers.

Select all the systems that are also guaranteed to have the solution (3,-1)

a.) (P + F)x + (Q + G)Y = R + H

Fx + Gy = H

b.) (P + F)x + Qy = R + H

Fx + (G + Q)y = H

c.) Px + Qy = R

(3P + F)x + (3Q + G)y = 3H + R

d.) Px + Qy = R

(F - 2P)x +(G - 2Q)y = H - 2R

e.) Px + Qy = R

5Fx + 5Gy = 5H

*Please explain how you got your answer because I really don't understand this!