1/3x+3=5/6x-18

Solution for 1/3x+3=5/6x-18 equation:

1/3x+3=5/6x-18

We move all terms to the left:

1/3x+3-(5/6x-18)=0


Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R



Domain of the equation: 6x-18)!=0

x∈R


We get rid of parentheses

1/3x-5/6x+18+3=0

We calculate fractions


6x/18x^2+(-15x)/18x^2+18+3=0

We add all the numbers together, and all the variables

6x/18x^2+(-15x)/18x^2+21=0

We multiply all the terms by the denominator


6x+(-15x)+21*18x^2=0

Wy multiply elements

378x^2+6x+(-15x)=0

We get rid of parentheses

378x^2+6x-15x=0

We add all the numbers together, and all the variables

378x^2-9x=0

a = 378; b = -9; c = 0;
Δ = b2-4ac
Δ = -92-4·378·0
Δ = 81
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{81}=9$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-9)-9}{2*378}=\frac{0}{756}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-9)+9}{2*378}=\frac{18}{756}
=1/42
$