1/6x+1/3x=12

Solution for 1/6x+1/3x=12 equation:

1/6x+1/3x=12

We move all terms to the left:

1/6x+1/3x-(12)=0


Domain of the equation: 6x!=0

x!=0/6

x!=0

x∈R



Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R


We calculate fractions


3x/18x^2+6x/18x^2-12=0

We multiply all the terms by the denominator


3x+6x-12*18x^2=0

We add all the numbers together, and all the variables

9x-12*18x^2=0

Wy multiply elements

-216x^2+9x=0

a = -216; b = 9; c = 0;
Δ = b2-4ac
Δ = 92-4·(-216)·0
Δ = 81
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{81}=9$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(9)-9}{2*-216}=\frac{-18}{-432}
=1/24
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(9)+9}{2*-216}=\frac{0}{-432}
=0
$