X=(y+21)/0.7

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Solution for X=(y+21)/0.7 equation: 



X=(X+21)/0.7

We move all terms to the left:

X-((X+21)/0.7)=0

We multiply all the terms by the denominator


X*0.7)-((X+21)=0

Wy multiply elements

0X^2=0

We add all the numbers together, and all the variables

X^2=0

a = 1; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·1·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

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

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