x(x+1)=(x)(x-3)

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Solution for x(x+1)=(x)(x-3) equation: 



x(x+1)=(x)(x-3)

We move all terms to the left:

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

We multiply parentheses

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



We calculate terms in parentheses: -(x(x-3)), so:

x(x-3)

We multiply parentheses

x^2-3x

Back to the equation:

-(x^2-3x)



We get rid of parentheses

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

We add all the numbers together, and all the variables

4x=0

x=0/4

x=0

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