1/5x-3=2x

Solution for 1/5x-3=2x equation:

1/5x-3=2x

We move all terms to the left:

1/5x-3-(2x)=0


Domain of the equation: 5x!=0

x!=0/5

x!=0

x∈R


We add all the numbers together, and all the variables

-2x+1/5x-3=0

We multiply all the terms by the denominator


-2x*5x-3*5x+1=0

Wy multiply elements

-10x^2-15x+1=0

a = -10; b = -15; c = +1;
Δ = b2-4ac
Δ = -152-4·(-10)·1
Δ = 265
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-15)-\sqrt{265}}{2*-10}=\frac{15-\sqrt{265}}{-20}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-15)+\sqrt{265}}{2*-10}=\frac{15+\sqrt{265}}{-20}
$