(x-6)(4)=(x+9)(9)

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Solution for (x-6)(4)=(x+9)(9) equation: 



(x-6)(4)=(x+9)(9)

We move all terms to the left:

(x-6)(4)-((x+9)(9))=0

We multiply parentheses

4x-((x+9)9)-24=0



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

(x+9)9

We multiply parentheses

9x+81

Back to the equation:

-(9x+81)



We get rid of parentheses

4x-9x-81-24=0

We add all the numbers together, and all the variables

-5x-105=0

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

-5x=105

x=105/-5

x=-21

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