# Incomplete answer to inequality

Consider the following inequality:

Q - `1 < (2*x + 3) < 9`

Ans - `x`

lies between `(-1, 3)`

But sagemath is only returning `x > -1`

as the answer, which is incomplete. Why is that?

```
sage:
sage: solve([ 1 < 2*x + 3 < 9 ], x)
[[x > -1]]
sage:
```