1/3x-8=14x-7-13x

Solution for 1/3x-8=14x-7-13x equation:

1/3x-8=14x-7-13x

We move all terms to the left:

1/3x-8-(14x-7-13x)=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-(x-7)-8=0

We get rid of parentheses

1/3x-x+7-8=0

We multiply all the terms by the denominator


-x*3x+7*3x-8*3x+1=0

Wy multiply elements

-3x^2+21x-24x+1=0

We add all the numbers together, and all the variables

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

a = -3; b = -3; c = +1;
Δ = b2-4ac
Δ = -32-4·(-3)·1
Δ = 21
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{-(-3)-\sqrt{21}}{2*-3}=\frac{3-\sqrt{21}}{-6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+\sqrt{21}}{2*-3}=\frac{3+\sqrt{21}}{-6}
$