# Solving for Variable in Mathematica

GROUPS:
 Hello,I am trying to solve a function for the independent variable in Mathematica. I followed the guidelines on this page. And tried this:Solve[(2 b ((b (1+x))/(y (1-x)+2 b sqrt(1-x^2))-x sqrt((1+x)/(1-x+2 b sqrt(1-x^2)))))/sqrt(1-x^2), x]But Mathematica said no interpretation was available. Does anyone know why this is not working?I thought it might have something to do with the constant, b, in the function.Thank you in advance,Natasha
5 years ago
6 Replies
 Youngjoo Chung 1 Vote Hi,Replace sqrt(...) with Sqrt[...] and add the right-hand side to the equation. It needs to be in the form lhs == rhs.Youngjoo Chung
5 years ago
 Sean Clarke 1 Vote If you recieve the message "No Interpretation Available", that means you are using Wolfram|Alpha through Mathematica. This means there is an orange equal sign left of your code. TWhen typing out Mathematica code, you will want this to evaluate directly in Mathematica instead. When this is done, there is no orange equal sign to the left of your code. To evaluate a command directly in Mathematica, open a new notebook and type directly into it. If you are not sure how to evaluate expressions in Mathematica,  please try going through the Mathematica virtual book to learn more about the basics of using Mathematica.First, begin by going to the documentation for Solve and try evaluating some of the examples. Do you have any problems doing this? Try making some changes to the examples in the documentation for Solve and evaluating them.
5 years ago
 Hi!Thank you so much for the pointers. I believe I managed to correct the input:Solve[(2 b ((b (1 + x))/(c (1 - x) + 2 b Sqrt[1 - x^2]) -x Sqrt[(1 + x)/(1 - x + (2/b) Sqrt[1 - x^2])]))/Sqrt[1 - x^2] - y == 0, x]However, now it is taking 30min+ to run. It is still running. In the meantime, I tried to open another notebook to run some of the other examples and it took quite awhile. It is still computing 2+2. Is this to be expected?Thank you again,Natasha