16/5x-16=4x

Solution for 16/5x-16=4x equation:

16/5x-16=4x

We move all terms to the left:

16/5x-16-(4x)=0


Domain of the equation: 5x!=0

x!=0/5

x!=0

x∈R


We add all the numbers together, and all the variables

-4x+16/5x-16=0

We multiply all the terms by the denominator


-4x*5x-16*5x+16=0

Wy multiply elements

-20x^2-80x+16=0

a = -20; b = -80; c = +16;
Δ = b2-4ac
Δ = -802-4·(-20)·16
Δ = 7680
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:

$\sqrt{\Delta}=\sqrt{7680}=\sqrt{256*30}=\sqrt{256}*\sqrt{30}=16\sqrt{30}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-80)-16\sqrt{30}}{2*-20}=\frac{80-16\sqrt{30}}{-40}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-80)+16\sqrt{30}}{2*-20}=\frac{80+16\sqrt{30}}{-40}
$