8=4/1-r

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Solution for 8=4/1-r equation: 



8=4/1-r

We move all terms to the left:

8-(4/1-r)=0



Domain of the equation: 1-r)!=0

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

-r)!=-1

r!=-1/1

r!=-1

r∈R



We add all the numbers together, and all the variables

-(-1r)+8=0

We get rid of parentheses

1r+8=0

We add all the numbers together, and all the variables

r+8=0

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

r=-8

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