40=4000/12(r)

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Solution for 40=4000/12(r) equation: 



40=4000/12(r)

We move all terms to the left:

40-(4000/12(r))=0



Domain of the equation: 12r)!=0

r!=0/1

r!=0

r∈R



We add all the numbers together, and all the variables

-(+4000/12r)+40=0

We get rid of parentheses

-4000/12r+40=0

We multiply all the terms by the denominator


40*12r-4000=0

Wy multiply elements

480r-4000=0

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

480r=4000

r=4000/480

r=8+1/3

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