I have this question, but don't know how to even start. Suppose (M) is a linear system of 2 equations and 3 unknowns, where (2,-3,1) its solution. Suppose (O) is a matching homogeneous linear system, where (-1,1,1) and (1,0,1) its solutions. How can I find the general solution of (M)? I'm totally lost with this one and appreciate any help.