23 Find parametric equations of the line of intersection of

2.3) Find parametric equations of the line of intersection of the two planes x + y + z = 1
and - 2x + y - z = 2

eliminating x, we get 3y+z=0 z=-3y=k(let) y=-k/3 x=1-2/3*k 3*(x-1)/2=-3y=z