((13+5)/(3-r))=8

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Solution for ((13+5)/(3-r))=8 equation: 



((13+5)/(3-r))=8

We move all terms to the left:

((13+5)/(3-r))-(8)=0



Domain of the equation: (3-r))!=0

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

-r)!=-3

r!=-3/1

r!=-3

r∈R



We add all the numbers together, and all the variables

(18/(-1r+3))-8=0

We multiply all the terms by the denominator


(18-8*(-1r+3))=0



We calculate terms in parentheses: +(18-8*(-1r+3)), so:

18-8*(-1r+3)

determiningTheFunctionDomain
-8*(-1r+3)+18

We multiply parentheses

8r-24+18

We add all the numbers together, and all the variables

8r-6

Back to the equation:

+(8r-6)



We get rid of parentheses

8r-6=0

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

8r=6

r=6/8

r=3/4

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