X=(1+0.05x)*(4000-80x)

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Solution for X=(1+0.05x)*(4000-80x) equation: 



X=(1+0.05X)(4000-80X)

We move all terms to the left:

X-((1+0.05X)(4000-80X))=0

We add all the numbers together, and all the variables

X-((0.05X+1)(-80X+4000))=0

We multiply parentheses ..

-((+0X^2+0X-80X+4000))+X=0



We calculate terms in parentheses: -((+0X^2+0X-80X+4000)), so:

(+0X^2+0X-80X+4000)

We get rid of parentheses

0X^2+0X-80X+4000

We add all the numbers together, and all the variables

X^2-79X+4000

Back to the equation:

-(X^2-79X+4000)



We add all the numbers together, and all the variables

X-(X^2-79X+4000)=0

We get rid of parentheses

-X^2+X+79X-4000=0

We add all the numbers together, and all the variables

-1X^2+80X-4000=0

a = -1; b = 80; c = -4000;
Δ = b2-4ac
Δ = 802-4·(-1)·(-4000)
Δ = -9600
Delta is less than zero, so there is no solution for the equation

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