3x-5/X=8

Solution for 3x-5/X=8 equation:

3x-5/x=8

We move all terms to the left:

3x-5/x-(8)=0


Domain of the equation: x!=0

x∈R


We multiply all the terms by the denominator


3x*x-8*x-5=0

We add all the numbers together, and all the variables

-8x+3x*x-5=0

Wy multiply elements

3x^2-8x-5=0

a = 3; b = -8; c = -5;
Δ = b2-4ac
Δ = -82-4·3·(-5)
Δ = 124
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{124}=\sqrt{4*31}=\sqrt{4}*\sqrt{31}=2\sqrt{31}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-8)-2\sqrt{31}}{2*3}=\frac{8-2\sqrt{31}}{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-8)+2\sqrt{31}}{2*3}=\frac{8+2\sqrt{31}}{6}
$