x(20-2x)(16-2x)=420

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Solution for x(20-2x)(16-2x)=420 equation: 



x(20-2x)(16-2x)=420

We move all terms to the left:

x(20-2x)(16-2x)-(420)=0

We add all the numbers together, and all the variables

x(-2x+20)(-2x+16)-420=0

We multiply parentheses ..

x(+4x^2-32x-40x+320)-420=0

We multiply parentheses

4x^3-32x^2-40x^2+320x-420=0

We do not support expression: x^3

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