13=21/2r

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Solution for 13=21/2r equation: 



13=21/2r

We move all terms to the left:

13-(21/2r)=0



Domain of the equation: 2r)!=0

r!=0/1

r!=0

r∈R



We add all the numbers together, and all the variables

-(+21/2r)+13=0

We get rid of parentheses

-21/2r+13=0

We multiply all the terms by the denominator


13*2r-21=0

Wy multiply elements

26r-21=0

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

26r=21

r=21/26

r=21/26

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