Find R: Internal Resistance Equation

[heelp]

In this equation I r= E-V/V*R


How would I find R? thanks in advance you your help.

 

[berkeman]

What do you mean? Are you asking about how to do the algebraic manipulations? And where are the parens in your equation?

 

[heelp]

Oops. r= (E-V/v)*R

This equation shows that knowing the emf E, the voltmeter's reading of the terminal voltatge V, and the resistance of the voltmeter R, the unknown internal resistance r of the battery can be computed.


I'm trying to find r. I know E,AND V. But I don't know how to find R.