C=(1-0.30c)c+20

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Solution for C=(1-0.30c)c+20 equation: 



=(1-0.30C)C+20

We move all terms to the left:

-((1-0.30C)C+20)=0

We add all the numbers together, and all the variables

-((-0.3C+1)C+20)=0



We calculate terms in parentheses: -((-0.3C+1)C+20), so:

(-0.3C+1)C+20

We multiply parentheses

0C^2+C+20

We add all the numbers together, and all the variables

C^2+C+20

Back to the equation:

-(C^2+C+20)



We get rid of parentheses

-C^2-C-20=0

We add all the numbers together, and all the variables

-1C^2-1C-20=0

a = -1; b = -1; c = -20;
Δ = b2-4ac
Δ = -12-4·(-1)·(-20)
Δ = -79
Delta is less than zero, so there is no solution for the equation

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