1. The problem statement, all variables and given/known data Hello all, I'm trying to solve for 3 unknowns x,y,z. We are given these formulas: http://screencast.com/t/Y8QobUXVB3S3 [Broken] 2. Relevant equations Please see link provided above. 3. The attempt at a solution I first rearrage for root(x) then I rearrange equation 2 for root(y), I then sub root(x) into equation 2. From this point I'm a little confused on how to proceed? The problem I think is that in the formula for root(y) I still have root(z) unknown, root(z) has root(x) and also has a root (y), we know root(x) but it, itself contains root(y) and root(z) which is going in a weird loop that is making me really confused.