(12+x)/x=21/3

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Solution for (12+x)/x=21/3 equation: 



(12+x)/x=21/3

We move all terms to the left:

(12+x)/x-(21/3)=0



Domain of the equation: x!=0

x∈R



We add all the numbers together, and all the variables

(x+12)/x-7=0

We multiply all the terms by the denominator


(x+12)-7*x=0

We add all the numbers together, and all the variables

-7x+(x+12)=0

We get rid of parentheses

-7x+x+12=0

We add all the numbers together, and all the variables

-6x+12=0

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

-6x=-12

x=-12/-6

x=+2

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