1/x-1/3x=1/2

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

1/x-1/3x=1/2

We move all terms to the left:

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


Domain of the equation: x!=0

x∈R



Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R


We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We calculate fractions


(-9x^2)/12x^2+12x/12x^2+(-4x)/12x^2=0

We multiply all the terms by the denominator


(-9x^2)+12x+(-4x)=0

We get rid of parentheses

-9x^2+12x-4x=0

We add all the numbers together, and all the variables

-9x^2+8x=0

a = -9; b = 8; c = 0;
Δ = b2-4ac
Δ = 82-4·(-9)·0
Δ = 64
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{64}=8$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-8}{2*-9}=\frac{-16}{-18}
=8/9
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+8}{2*-9}=\frac{0}{-18}
=0
$