3+6/x=4+x

Solution for 3+6/x=4+x equation:

3+6/x=4+x

We move all terms to the left:

3+6/x-(4+x)=0


Domain of the equation: x!=0

x∈R


We add all the numbers together, and all the variables

6/x-(x+4)+3=0

We get rid of parentheses

6/x-x-4+3=0

We multiply all the terms by the denominator


-x*x-4*x+3*x+6=0

We add all the numbers together, and all the variables

-1x-x*x+6=0

Wy multiply elements

-1x^2-1x+6=0

a = -1; b = -1; c = +6;
Δ = b2-4ac
Δ = -12-4·(-1)·6
Δ = 25
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{25}=5$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1)-5}{2*-1}=\frac{-4}{-2}
=+2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+5}{2*-1}=\frac{6}{-2}
=-3
$