Question: free variables in solve


I am trying to solve a large system using solve(). Fortunately, my system is linear and it does have solutions. Actually, the system has free variables that gives multiple solutions.

However, I have hundreds of variables with different names and subscripts, and I only need one solution of the system. I noticed that solve() actually output the solution with the free variables on the right. So, is there a way that I can find all the free variables and give them 0, to get only one set of solution?



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