(3-x)(-x)-18=x(x-6)

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Solution for (3-x)(-x)-18=x(x-6) equation: 



(3-x)(-x)-18=x(x-6)

We move all terms to the left:

(3-x)(-x)-18-(x(x-6))=0

We add all the numbers together, and all the variables

(-1x+3)(-1x)-(x(x-6))-18=0

We multiply parentheses ..

(+x^2-3x)-(x(x-6))-18=0



We calculate terms in parentheses: -(x(x-6)), so:

x(x-6)

We multiply parentheses

x^2-6x

Back to the equation:

-(x^2-6x)



We get rid of parentheses

x^2-x^2-3x+6x-18=0

We add all the numbers together, and all the variables

3x-18=0

We move all terms containing x to the left, all other terms to the right

3x=18

x=18/3

x=6

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