We recommend against that.
I suspect you should consider using the single output version of solve(): when there is more than one variable being solved for, it returns a struct or struct array whose fields are named after the variables. You can use that struct as the second input of subs()
sol = solve(....)
subs(EXPRESSION, sol)
When you compute a value and think you want to assign it to a a dynamic variable name, then the large majority of the time it is better to subs() instead.
