I=V/R+r

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Solution for I=V/R+r equation: 



=/+I

We move all terms to the left:

-(/+I)=0



Domain of the equation: +I)!=0

I!=0/1

I!=0

I∈R



We add all the numbers together, and all the variables

-(I+1)=0

We get rid of parentheses

-I-1=0

We add all the numbers together, and all the variables

-1I-1=0

We move all terms containing I to the left, all other terms to the right

-I=1

I=1/-1

I=-1

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