Someone told me about the LM317t voltage regulator.

I have no electronic experience. The schematics I have seen make no sense

to me what so ever. I have found a page with a resistor calculator.

From it it seems I need a R1 value of 650 ohms and a R2 value 0f 950 ohms

to give me a voltage output 3.08v. My question is if the input voltage id 9v,

can I use 1 resistor between adjustable voltage out and my electric motor.

If so would the resistor need to be the values of R1 and R2 added together?

Any help you can give is greatly appreciated.