-81=-9(x+8)

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Solution for -81=-9(x+8) equation: 



-81=-9(x+8)

We move all terms to the left:

-81-(-9(x+8))=0



We calculate terms in parentheses: -(-9(x+8)), so:

-9(x+8)

We multiply parentheses

-9x-72

Back to the equation:

-(-9x-72)



We get rid of parentheses

9x+72-81=0

We add all the numbers together, and all the variables

9x-9=0

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

9x=9

x=9/9

x=1

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