(36,5/21)*x=9

Solution for (36,5/21)*x=9 equation:

(36.5/21)*x=9

We move all terms to the left:

(36.5/21)*x-(9)=0


Domain of the equation: 21)*x!=0

x!=0/1

x!=0

x∈R


We add all the numbers together, and all the variables

(+36.5/21)*x-9=0

We multiply parentheses

36x^2-9=0

a = 36; b = 0; c = -9;
Δ = b2-4ac
Δ = 02-4·36·(-9)
Δ = 1296
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1296}=36$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-36}{2*36}=\frac{-36}{72}
=-1/2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+36}{2*36}=\frac{36}{72}
=1/2
$