3=7/(7+x)

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Solution for 3=7/(7+x) equation: 



3=7/(7+x)

We move all terms to the left:

3-(7/(7+x))=0



Domain of the equation: (7+x))!=0

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

x)!=-7

x!=-7/1

x!=-7

x∈R



We add all the numbers together, and all the variables

-(7/(x+7))+3=0

We multiply all the terms by the denominator


-(7+3*(x+7))=0



We calculate terms in parentheses: -(7+3*(x+7)), so:

7+3*(x+7)

determiningTheFunctionDomain
3*(x+7)+7

We multiply parentheses

3x+21+7

We add all the numbers together, and all the variables

3x+28

Back to the equation:

-(3x+28)



We get rid of parentheses

-3x-28=0

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

-3x=28

x=28/-3

x=-9+1/3

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