2/5x+x=180

Solution for 2/5x+x=180 equation:

2/5x+x=180

We move all terms to the left:

2/5x+x-(180)=0


Domain of the equation: 5x!=0

x!=0/5

x!=0

x∈R


We add all the numbers together, and all the variables

x+2/5x-180=0

We multiply all the terms by the denominator


x*5x-180*5x+2=0

Wy multiply elements

5x^2-900x+2=0

a = 5; b = -900; c = +2;
Δ = b2-4ac
Δ = -9002-4·5·2
Δ = 809960
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:

$\sqrt{\Delta}=\sqrt{809960}=\sqrt{4*202490}=\sqrt{4}*\sqrt{202490}=2\sqrt{202490}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-900)-2\sqrt{202490}}{2*5}=\frac{900-2\sqrt{202490}}{10}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-900)+2\sqrt{202490}}{2*5}=\frac{900+2\sqrt{202490}}{10}
$