y=31-((80-20y)/10)

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Solution for y=31-((80-20y)/10) equation: 



y=31-((80-20y)/10)

We move all terms to the left:

y-(31-((80-20y)/10))=0

We add all the numbers together, and all the variables

y-(31-((-20y+80)/10))=0

We multiply all the terms by the denominator


y*10))-(31-((-20y+80)=0

Wy multiply elements

10y^2=0

a = 10; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·10·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$y=\frac{-b}{2a}=\frac{0}{20}=0$

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