0.4=(x-12)/x

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Solution for 0.4=(x-12)/x equation: 



0.4=(x-12)/x

We move all terms to the left:

0.4-((x-12)/x)=0



Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R



We multiply all the terms by the denominator


-((x-12)+(0.4)*x)=0



We calculate terms in parentheses: -((x-12)+(0.4)*x), so:

(x-12)+(0.4)*x

We multiply parentheses

(x-12)+0.4x

We get rid of parentheses

x+0.4x-12

We add all the numbers together, and all the variables

1.4x-12

Back to the equation:

-(1.4x-12)



We get rid of parentheses

-1.4x+12=0

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

-1.4x=-12

x=-12/-1.4

x=8+0.8/1.4

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