(9+3)/(5-r)=2

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Solution for (9+3)/(5-r)=2 equation: 



(9+3)/(5-r)=2

We move all terms to the left:

(9+3)/(5-r)-(2)=0



Domain of the equation: (5-r)!=0

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

-r!=-5

r!=-5/-1

r!=+5

r∈R



We add all the numbers together, and all the variables

12/(-1r+5)-2=0

We multiply all the terms by the denominator


-2*(-1r+5)+12=0

We multiply parentheses

2r-10+12=0

We add all the numbers together, and all the variables

2r+2=0

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

2r=-2

r=-2/2

r=-1

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