4.2=(10.8+5x)/x+3

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Solution for 4.2=(10.8+5x)/x+3 equation: 



4.2=(10.8+5x)/x+3

We move all terms to the left:

4.2-((10.8+5x)/x+3)=0



Domain of the equation: x+3)!=0

x∈R



We add all the numbers together, and all the variables

-((5x+10.8)/x+3)+4.2=0

We multiply all the terms by the denominator


-((5x+10.8)+(4.2)*x+3)=0



We calculate terms in parentheses: -((5x+10.8)+(4.2)*x+3), so:

(5x+10.8)+(4.2)*x+3

We multiply parentheses

(5x+10.8)+4.2x+3

We get rid of parentheses

5x+4.2x+10.8+3

We add all the numbers together, and all the variables

9.2x+13.8

Back to the equation:

-(9.2x+13.8)



We get rid of parentheses

-9.2x-13.8=0

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

-9.2x=13.8

x=13.8/-9.2

x=-1+2.875/5.75

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