x+2/5x=56

Solution for x+2/5x=56 equation:

x+2/5x=56

We move all terms to the left:

x+2/5x-(56)=0


Domain of the equation: 5x!=0

x!=0/5

x!=0

x∈R


We multiply all the terms by the denominator


x*5x-56*5x+2=0

Wy multiply elements

5x^2-280x+2=0

a = 5; b = -280; c = +2;
Δ = b2-4ac
Δ = -2802-4·5·2
Δ = 78360
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:

$\sqrt{\Delta}=\sqrt{78360}=\sqrt{4*19590}=\sqrt{4}*\sqrt{19590}=2\sqrt{19590}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-280)-2\sqrt{19590}}{2*5}=\frac{280-2\sqrt{19590}}{10}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-280)+2\sqrt{19590}}{2*5}=\frac{280+2\sqrt{19590}}{10}
$