I am trying to solve a system of equations which is
E=V*N(x) - r*B*N(x-s), x=(ln(V/r*B)+0.5*s^2)/s and s=(l*E)/V*N(x)
where N(x) is the cumulative normal density function. From all of these variables my unknowns are V, x and s. So write the code for the Wolfram Alpha in a numerical example
( 2342310000=V*0.5 Erfc[-0.707107 x]-0.97*62076781*0.5 Erfc[-0.707107 (x-s)], x={ln(2342310000/(0.97*62076781))+0.5*s^2}/s,
s=(0.568146418550082* 2342310000)/(V*0.5 Erfc[-0.707107 x]) )
(note that the N(x) distribution i write it as 0.5*erfv(-0.707107x) as it is described by wolfram alpha http://goo.gl/AN4INU and the outcome that I take is not numerical for the variables V, x and s but it rather transports the equations into this form
I think it cannot compute the erfc . If anyone could tell me what I am doing wrong I would be thankful