I'm having a lot of trouble trying to figure this out. Our prof hasn't covered this and we our assignment is due in two days. I'm trying to figure this out on my own:
Consider the two lines $L_1:x=-2t, y=1+2t, z=3t$ and $L_2:x=-1+4s,y=3+2s,z=5+s$. Find the point $P:(x,y,z)$ of intersection of the two lines.