-1/3x+1=x-3

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

-1/3x+1=x-3

We move all terms to the left:

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


Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R


We get rid of parentheses

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

We multiply all the terms by the denominator


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

Wy multiply elements

-3x^2+9x+3x-1=0

We add all the numbers together, and all the variables

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

a = -3; b = 12; c = -1;
Δ = b2-4ac
Δ = 122-4·(-3)·(-1)
Δ = 132
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:

$\sqrt{\Delta}=\sqrt{132}=\sqrt{4*33}=\sqrt{4}*\sqrt{33}=2\sqrt{33}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(12)-2\sqrt{33}}{2*-3}=\frac{-12-2\sqrt{33}}{-6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(12)+2\sqrt{33}}{2*-3}=\frac{-12+2\sqrt{33}}{-6}
$