Solve for A and B
0.433= (45.6*A) + (3.152*B)
0.3363= (11.92*A) + (37.675*B)
Label the equations 1 and 2.
(1) 0.433= (45.6*A) + (3.152*B)
(2) 0.3363= (11.92*A) + (37.675*B)
Rearrange (1) and solve for A.
45.6A = 3.152B - 0.433
A = (3.152B-0.433)/45.6
Then substitute A from above into equation 2, This will give you only one unknown (which is A), solve for that, substitute it into equation 1 and solve for B.
Post your work if you get stuck.