-3x=21/3x

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Solution for -3x=21/3x equation: 



-3x=21/3x

We move all terms to the left:

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



Domain of the equation: 3x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

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

We get rid of parentheses

-3x-21/3x=0

We multiply all the terms by the denominator


-3x*3x-21=0

Wy multiply elements

-9x^2-21=0

a = -9; b = 0; c = -21;
Δ = b2-4ac
Δ = 02-4·(-9)·(-21)
Δ = -756
Delta is less than zero, so there is no solution for the equation

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