I've tried expanding the equation out using the identity but still end up with 3 instances of x on that side of the equation for each component of the vector. I'm really stuck here. No matter which way I look at it I can't seem to isolate X. I've tried using different identities but can't solve it. The original equation works when I substitute known data so it must be able to be transposed but I can't see it at the moment. Can somebody help?