Hi, please give me some help here...
There are 2 equation systems:
1)
ax + by + cz = d
fx + gy + hz = k

2)
ax + by + cz = 0
fx + gy + hz = 0

It's given that (2,-3,1) is a solution for the first and (1,0,1) and (-1,1,1) are solutions for the second.

How do I find the general solution(s) for both systems?

Thank you in advance, and very much appreciated!