3.5=(45-x)/x

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Solution for 3.5=(45-x)/x equation: 



3.5=(45-x)/x

We move all terms to the left:

3.5-((45-x)/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

-((-1x+45)/x)+3.5=0

We multiply all the terms by the denominator


-((-1x+45)+(3.5)*x)=0



We calculate terms in parentheses: -((-1x+45)+(3.5)*x), so:

(-1x+45)+(3.5)*x

We multiply parentheses

(-1x+45)+3.5x

We get rid of parentheses

-1x+3.5x+45

We add all the numbers together, and all the variables

2.5x+45

Back to the equation:

-(2.5x+45)



We get rid of parentheses

-2.5x-45=0

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

-2.5x=45

x=45/-2.5

x=-18

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