Question

using substitution or elimination method solve.
{x-3y-z=-9
-2x+y+2z=3
2x+y+3z=8}

Answer 1

pick 2 and solve for x, y or z. After finding 2 of them, plug them in on the equation that you didn't use.

Answer 2

and z

Answer 3

which one should I use to solve for ... I don't know what to do.

Answer 4

pick one and solve for whatever letter you want to solve first