Simple 1-10V signal inverter

Hello!

How to set up one op-amp that can invert a DC signal going from 1 - 8 V?

So when the input voltage is 1 V the output should be 8 V. And if the input voltage is 8 V the output should be 1 V. And to make things clear when the input signal is for example 3 V the output voltage should be 6 V. So the dynamic must be kept.

Thanks in advice.

You'll need a reference voltage that is midway between 1 & 8 V.
This is 4.5V and it connects to the + input.
The rest is ordinary inverting configuration, a resistor from signal in to - input & an equal resistor from output to - input.

Works perfectly!
Thank you!