Okay, so this equation is coming from a physics problem, which I essentially already solved (the physics part). The only thing I am stuck on is the algebra (I think) portion of it, so the details of the problem itself do not matter. I know the answer already as well, I just can't get to it myself. The equation is: 5v12 - 3vo2-2v1vo=0 For simplicity you can use: 5x2-3y2-2xy=0 I am solving for v1 which should equal (-3vo)/5 If someone could just point me in some direction, that would be great. I have no idea where to start, since I have very little experience with solving for multi-variables without 2 equations.