x=1/3x+5

Solution for x=1/3x+5 equation:

x=1/3x+5

We move all terms to the left:

x-(1/3x+5)=0


Domain of the equation: 3x+5)!=0

x∈R


We get rid of parentheses

x-1/3x-5=0

We multiply all the terms by the denominator


x*3x-5*3x-1=0

Wy multiply elements

3x^2-15x-1=0

a = 3; b = -15; c = -1;
Δ = b2-4ac
Δ = -152-4·3·(-1)
Δ = 237
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{-(-15)-\sqrt{237}}{2*3}=\frac{15-\sqrt{237}}{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-15)+\sqrt{237}}{2*3}=\frac{15+\sqrt{237}}{6}
$