; Combine 3 simultaneous linear equations with 3 unknowns (x, y, z).
; Solve for all 3 unknowns using the "eliminate" command.

clear all
d1=a1*x+b1*y+c1*z
d2=a2*x+b2*y+c2*z
d3=a3*x+b3*y+c3*z
2 ; select equation number 2
eliminate x
3 ; select equation number 3
eliminate x y
z ; solve for z
2 ; select equation number 2
eliminate z using 3
1 ; select equation number 1
eliminate y z
simplify all ; list all solutions