-9=3/4)x-21

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Solution for -9=3/4)x-21 equation: 



-9=3/4)x-21

We move all terms to the left:

-9-(3/4)x-21)=0



Domain of the equation: 4)x!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

-(+3/4)x-9-21)=0

We add all the numbers together, and all the variables

-(+3/4)x=0

We multiply parentheses

-3x^2=0

a = -3; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·(-3)·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{0}{-6}=0$

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