(4/7)*(x-4)=4

Solution for (4/7)*(x-4)=4 equation:

(4/7)(x-4)=4

We move all terms to the left:

(4/7)(x-4)-(4)=0


Domain of the equation: 7)(x-4)!=0

x∈R


We add all the numbers together, and all the variables

(+4/7)(x-4)-4=0

We multiply parentheses ..

(+4x^2+4/7*-4)-4=0

We multiply all the terms by the denominator


(+4x^2+4-4*7*-4)=0

We get rid of parentheses

4x^2+4-4-4*7*=0

We add all the numbers together, and all the variables

4x^2=0

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

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{0}{8}=0$