5/2x-x=-30

Solution for 5/2x-x=-30 equation:

5/2x-x=-30

We move all terms to the left:

5/2x-x-(-30)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R


We add all the numbers together, and all the variables

-1x+5/2x+30=0

We multiply all the terms by the denominator


-1x*2x+30*2x+5=0

Wy multiply elements

-2x^2+60x+5=0

a = -2; b = 60; c = +5;
Δ = b2-4ac
Δ = 602-4·(-2)·5
Δ = 3640
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:

$\sqrt{\Delta}=\sqrt{3640}=\sqrt{4*910}=\sqrt{4}*\sqrt{910}=2\sqrt{910}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(60)-2\sqrt{910}}{2*-2}=\frac{-60-2\sqrt{910}}{-4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(60)+2\sqrt{910}}{2*-2}=\frac{-60+2\sqrt{910}}{-4}
$