Is there a way to for Ax and Ab first so that I can use the values to solve the rest of the matrix?

Solving for x=[Ax Ay Bx By Cx Cy Dx Dy Nb Nc T]

theta=30
sign=(cosd (theta)/abs (cosd (theta)))
u=.8
R=12
c=4.59
y=18
Md=50
Id=(.5*Md*R^2)
Mp=75
Md=50
Mb=30
alpha=0
u=.8
L=6*R
g=9.81
Ax=?
Ab=?

a=[1 0 1 0 0 0 0 0 0 0 0; 0 1 0 1 0 0 0 0 0 0 0; 0 0 -R*sind(theta) R*cosd(theta) 0 0 0 0 0 0 1; 0 0 0 0 1 0 1 0 0 0 0; 0 0 0 0 0 1 0 1 0 0 0; 0 0 0 0 -R*sind(theta) R*cosd(theta) 0 0 0 0 0; 0 0 -1 0 -1 0 0 0 (4*abs(sign)) 0 0; 0 0 0 -1 0 -1 0 0 (-4*u*sign) 0 0; 0 0 -c (3*R) -c  (-3*R) 0 0 (-4*(y-c)) 0 0; 0 0 0 0 0 0 0 0 -sign u*sign 0; 0 0 0 0 0 0 0 0 (-u*sign) 1 0]

C=[0 Md*g Id*alpha 0 Md*g Id*alpha Mp*Ax Mp*y 0 Mb*Ab Mb*g]

x=C/a