1/3x-4=-x-2

Solution for 1/3x-4=-x-2 equation:

1/3x-4=-x-2

We move all terms to the left:

1/3x-4-(-x-2)=0


Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R


We add all the numbers together, and all the variables

1/3x-(-1x-2)-4=0

We get rid of parentheses

1/3x+1x+2-4=0

We multiply all the terms by the denominator


1x*3x+2*3x-4*3x+1=0

Wy multiply elements

3x^2+6x-12x+1=0

We add all the numbers together, and all the variables

3x^2-6x+1=0

a = 3; b = -6; c = +1;
Δ = b2-4ac
Δ = -62-4·3·1
Δ = 24
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:

$\sqrt{\Delta}=\sqrt{24}=\sqrt{4*6}=\sqrt{4}*\sqrt{6}=2\sqrt{6}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-6)-2\sqrt{6}}{2*3}=\frac{6-2\sqrt{6}}{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-6)+2\sqrt{6}}{2*3}=\frac{6+2\sqrt{6}}{6}
$