Need help with find a value

With Find you need a Given, together with an initial guess for M.  However, that still doesn't seem to work here (doesn't want to converge to a solution.  Luckily this is easy to represent as a quadratic which is simple to solve:

Alan

You can get it to work with Given Find by first dividing through by (0.8SMYS)^2.  (Note: you also need to make sigma.h multiply the third term.  As originally written it had no multiply sign, so MCAD thought the third term was a function.)

Alan