3+1/3x=x+1

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

3+1/3x=x+1

We move all terms to the left:

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


Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R


We get rid of parentheses

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

We multiply all the terms by the denominator


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

Wy multiply elements

-3x^2-3x+9x+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 = 48
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:

$\sqrt{\Delta}=\sqrt{48}=\sqrt{16*3}=\sqrt{16}*\sqrt{3}=4\sqrt{3}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6)-4\sqrt{3}}{2*-3}=\frac{-6-4\sqrt{3}}{-6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6)+4\sqrt{3}}{2*-3}=\frac{-6+4\sqrt{3}}{-6}
$