4/5*x-1/4*x=11

Solution for 4/5*x-1/4*x=11 equation:

4/5*x-1/4*x=11

We move all terms to the left:

4/5*x-1/4*x-(11)=0


Domain of the equation: 5*x!=0

x!=0/1

x!=0

x∈R



Domain of the equation: 4*x!=0

x!=0/1

x!=0

x∈R


We calculate fractions


(-5x^2)/80x^2+16x^2/80x^2-11=0

We multiply all the terms by the denominator


(-5x^2)+16x^2-11*80x^2=0

We add all the numbers together, and all the variables

16x^2+(-5x^2)-11*80x^2=0

Wy multiply elements

16x^2+(-5x^2)-880x^2=0

We get rid of parentheses

16x^2-5x^2-880x^2=0

We add all the numbers together, and all the variables

-869x^2=0

a = -869; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·(-869)·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{0}{-1738}=0$