X(x-7)+16=x(x+9)

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Solution for X(x-7)+16=x(x+9) equation: 



X(X-7)+16=X(X+9)

We move all terms to the left:

X(X-7)+16-(X(X+9))=0

We multiply parentheses

X^2-7X-(X(X+9))+16=0



We calculate terms in parentheses: -(X(X+9)), so:

X(X+9)

We multiply parentheses

X^2+9X

Back to the equation:

-(X^2+9X)



We get rid of parentheses

X^2-X^2-7X-9X+16=0

We add all the numbers together, and all the variables

-16X+16=0

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

-16X=-16

X=-16/-16

X=1

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