2x+800/x=80

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Solution for 2x+800/x=80 equation: 



2x+800/x=80

We move all terms to the left:

2x+800/x-(80)=0



Domain of the equation: x!=0

x∈R



We multiply all the terms by the denominator


2x*x-80*x+800=0

We add all the numbers together, and all the variables

-80x+2x*x+800=0

Wy multiply elements

2x^2-80x+800=0

a = 2; b = -80; c = +800;
Δ = b2-4ac
Δ = -802-4·2·800
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{80}{4}=20$

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