问题描述:

I am trying to solve a system of equations (5 unknown variables, 5 equations) but the `Solve[]`

function just hangs and I have to abort the evaluation. I can understand as some of the equations are quite messy-- in my opinion at least (I'm not a mathematician).

I checked the equations used in `Solve[]`

by substituting in "known/true" simulation values and they all work out.

So, my question is this: Is it possible to "help" `Solve[]`

by saying, for example...

`Solve[{eq1, eq2, eq3, eq4, eq5},{var1, var2, var3, var4, var5}, (*code here along the lines of { 0 < var1 < 10, var2 < 25, ...}*)]`

I can provide more information if it would be of assistance.

Thanks!

The program *Mathematica* provides actually very simple solution inside the function `Solve[]`

.
You can add all kind of desired conditions as inequalities `ConditionOnVar1, ConditionOnVar1`

:

```
Solve[{Eq1, Eq2, ConditionOnVar1, ConditionOnVar2},{Var1, Var2}]
```

```
Solve[Cos[theta]==1 && theta >= 0 && theta < 2\[Pi], theta]
```