Question 637356
P + R = 4 --------------EQUATION 1
QP + R = 10-------------EQUATION 2
P + QR = 14-------------EQUATION 3

ADD EQUATION 2 AND 3

QP + R + P + QR = 24

P(1 + Q) + R(1 + Q) = 24 
(1 + Q) (P + R) = 24 
1 + Q = 24 / 4 = 6    (FROM EQUATION 1, P + R =4 )

Q = 6 -1 = 5

Q = 5