Is there a way to subtract resistance w/out using an OP amp

[Marc.yo]

I don't have any OP amps and I need to get a lower resistance from a resistor, if that makes sense. If I remember correctly, if you split the line, and put resistors on each side and put the two lines back together, you subtract the two resistances. But I don't think thats correct....

[GREEN FUZ]

I`m not sure what is meant by not having an op-amp but if I understand the rest of your question correctly, yes you can reduce the resistance by putting two resistors in "parallel". There is a formula for working out the exact reduction but if, like me, you are mathematically challenged, you can go here for a handy calculator.

http://diystompboxes.com/analogalchemy/emh/emh.html

or

http://www.pronine.ca/parres.htm

[Marc.yo]

thanks much.

[CGDARK]

I don't have any OP amps and I need to get a lower resistance from a resistor, if that makes sense. If I remember correctly, if you split the line, and put resistors on each side and put the two lines back together, you subtract the two resistances. But I don't think thats correct....

You can do that with resistors in parallel. Look at the section Series and parallel circuits at:
http://en.wikipedia.org/wiki/Resistor

CG