1/2x+2/3x-5/6=9

Solution for 1/2x+2/3x-5/6=9 equation:

1/2x+2/3x-5/6=9

We move all terms to the left:

1/2x+2/3x-5/6-(9)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R



Domain of the equation: 3x!=0

x!=0/3

x!=0

x∈R


determiningTheFunctionDomain
1/2x+2/3x-9-5/6=0

We calculate fractions


(-90x^2)/216x^2+108x/216x^2+144x/216x^2-9=0

We multiply all the terms by the denominator


(-90x^2)+108x+144x-9*216x^2=0

We add all the numbers together, and all the variables

(-90x^2)+252x-9*216x^2=0

Wy multiply elements

(-90x^2)-1944x^2+252x=0

We get rid of parentheses

-90x^2-1944x^2+252x=0

We add all the numbers together, and all the variables

-2034x^2+252x=0

a = -2034; b = 252; c = 0;
Δ = b2-4ac
Δ = 2522-4·(-2034)·0
Δ = 63504
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{63504}=252$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(252)-252}{2*-2034}=\frac{-504}{-4068}
=14/113
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(252)+252}{2*-2034}=\frac{0}{-4068}
=0
$