12/4=9/x

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Solution for 12/4=9/x equation: 



12/4=9/x

We move all terms to the left:

12/4-(9/x)=0



Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

-(+9/x)+12/4=0

We add all the numbers together, and all the variables

-(+9/x)+3=0

We get rid of parentheses

-9/x+3=0

We multiply all the terms by the denominator


3*x-9=0

We add all the numbers together, and all the variables

3x-9=0

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

3x=9

x=9/3

x=3

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