need help with Active mixer and 180 degrees out of phase

Hello , i want to make a simple active mixer to place in front of the power amp.
I read some documents about active op-amp mixer.And they said :
"Any signal entering the inverting input of the op-amp will appear at the output but it will be 180 degrees out of phase.If the output of the first op-amp were recombined with one of the other signals at a later stage it would cancel out rather than mix. So we have to re-invert the phase with yet another op-amp."
and the schematic should like figure 1 to re-invert the signal .
But if i use the the mixer to direct feed input of power amp , can i use the schematic like figure 2(w/o re-invert the signal) ???

Thanks in advance!
Sorry for my bad English!

there is a non inverting pin on that thing,

i remember something about noise being lower by going inverting, or non inverting, can't remember, but  plenty of talent around here, should be a better response coming up shortly,  ???

You don't have to use the first. Second will do fine.

thanks !!!, that make my project alot simplier