1/6x=x-15

Solution for 1/6x=x-15 equation:

1/6x=x-15

We move all terms to the left:

1/6x-(x-15)=0


Domain of the equation: 6x!=0

x!=0/6

x!=0

x∈R


We get rid of parentheses

1/6x-x+15=0

We multiply all the terms by the denominator


-x*6x+15*6x+1=0

Wy multiply elements

-6x^2+90x+1=0

a = -6; b = 90; c = +1;
Δ = b2-4ac
Δ = 902-4·(-6)·1
Δ = 8124
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:

$\sqrt{\Delta}=\sqrt{8124}=\sqrt{4*2031}=\sqrt{4}*\sqrt{2031}=2\sqrt{2031}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(90)-2\sqrt{2031}}{2*-6}=\frac{-90-2\sqrt{2031}}{-12}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(90)+2\sqrt{2031}}{2*-6}=\frac{-90+2\sqrt{2031}}{-12}
$