2*(x)+(1/3*(x)=21

Solution for 2*(x)+(1/3*(x)=21 equation:

2(x)+(1/3(x)=21

We move all terms to the left:

2(x)+(1/3(x)-(21)=0


Domain of the equation: 3x-21!=0

We move all terms containing x to the left, all other terms to the right

3x!=21

x!=21/3

x!=7

x∈R


We multiply all the terms by the denominator


2x*3x-21+(1=0

We add all the numbers together, and all the variables

2x*3x=0

Wy multiply elements

6x^2=0

a = 6; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·6·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{0}{12}=0$