-5/6x-1/9x=-1

Solution for -5/6x-1/9x=-1 equation:

-5/6x-1/9x=-1

We move all terms to the left:

-5/6x-1/9x-(-1)=0


Domain of the equation: 6x!=0

x!=0/6

x!=0

x∈R



Domain of the equation: 9x!=0

x!=0/9

x!=0

x∈R


We add all the numbers together, and all the variables

-5/6x-1/9x+1=0

We calculate fractions


(-45x)/54x^2+(-6x)/54x^2+1=0

We multiply all the terms by the denominator


(-45x)+(-6x)+1*54x^2=0

Wy multiply elements

54x^2+(-45x)+(-6x)=0

We get rid of parentheses

54x^2-45x-6x=0

We add all the numbers together, and all the variables

54x^2-51x=0

a = 54; b = -51; c = 0;
Δ = b2-4ac
Δ = -512-4·54·0
Δ = 2601
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{2601}=51$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-51)-51}{2*54}=\frac{0}{108}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-51)+51}{2*54}=\frac{102}{108}
=17/18
$