2x-80/x=5

Solution for 2x-80/x=5 equation:

2x-80/x=5

We move all terms to the left:

2x-80/x-(5)=0


Domain of the equation: x!=0

x∈R


We multiply all the terms by the denominator


2x*x-5*x-80=0

We add all the numbers together, and all the variables

-5x+2x*x-80=0

Wy multiply elements

2x^2-5x-80=0

a = 2; b = -5; c = -80;
Δ = b2-4ac
Δ = -52-4·2·(-80)
Δ = 665
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-5)-\sqrt{665}}{2*2}=\frac{5-\sqrt{665}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-5)+\sqrt{665}}{2*2}=\frac{5+\sqrt{665}}{4}
$