20+x(30-2x)=400

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Solution for 20+x(30-2x)=400 equation: 



20+x(30-2x)=400

We move all terms to the left:

20+x(30-2x)-(400)=0

We add all the numbers together, and all the variables

x(-2x+30)+20-400=0

We add all the numbers together, and all the variables

x(-2x+30)-380=0

We multiply parentheses

-2x^2+30x-380=0

a = -2; b = 30; c = -380;
Δ = b2-4ac
Δ = 302-4·(-2)·(-380)
Δ = -2140
Delta is less than zero, so there is no solution for the equation

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