Find three different systems of linear equation whose solutions are.. Find three different systems of linear equation whose solutions are $x_1 = 3, x_2 = 0, x_3 = -1$
I'm confused, how exactly can I do this?

come up with an a linear equation that includes the indicated point.
e.g. $x + y + 3z = 0$
Now come up with two more.  If you want your solution to be unique you will need to make sure that the planes you have chosen are "linearly independent."
