X(x-9)+11=x(x+2)

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Solution for X(x-9)+11=x(x+2) equation: 



X(X-9)+11=X(X+2)

We move all terms to the left:

X(X-9)+11-(X(X+2))=0

We multiply parentheses

X^2-9X-(X(X+2))+11=0



We calculate terms in parentheses: -(X(X+2)), so:

X(X+2)

We multiply parentheses

X^2+2X

Back to the equation:

-(X^2+2X)



We get rid of parentheses

X^2-X^2-9X-2X+11=0

We add all the numbers together, and all the variables

-11X+11=0

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

-11X=-11

X=-11/-11

X=1

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