.3=(x-40)/x

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Solution for .3=(x-40)/x equation: 



.3=(x-40)/x

We move all terms to the left:

.3-((x-40)/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

-((x-40)/x)+0.3=0

We multiply all the terms by the denominator


-((x-40)+(0.3)*x)=0



We calculate terms in parentheses: -((x-40)+(0.3)*x), so:

(x-40)+(0.3)*x

We multiply parentheses

(x-40)+0.3x

We get rid of parentheses

x+0.3x-40

We add all the numbers together, and all the variables

1.3x-40

Back to the equation:

-(1.3x-40)



We get rid of parentheses

-1.3x+40=0

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

-1.3x=-40

x=-40/-1.3

x=30+1/1.3

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