I have been asked this poser by a "friend"...
X, Y, and Z satisfy:
X - Y - Z = 0 and 2X + Y + 3Z = 0
If Z is nonzero, what is the ratio of X to Z?
I'm not sure I understand what is required.. is this a simple linear equation?
As in z = -1.5x?
It seems a little obvious, but...
Please help, my O level in maths was many years ago.
Colin