(y/5)+(y/4)=(8/9)

Solution for (y/5)+(y/4)=(8/9) equation:

(y/5)+(y/4)=(8/9)

We move all terms to the left:

(y/5)+(y/4)-((8/9))=0

We add all the numbers together, and all the variables

(+y/5)+(+y/4)-((+8/9))=0

We get rid of parentheses

y/5+y/4-((+8/9))=0

We calculate fractions


324y^2/()+405y^2/()+()/()=0

We add all the numbers together, and all the variables

324y^2/()+405y^2/()+1=0

We multiply all the terms by the denominator


324y^2+405y^2+1*()=0

We add all the numbers together, and all the variables

729y^2=0

a = 729; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·729·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$y=\frac{-b}{2a}=\frac{0}{1458}=0$