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-36=-9(6+2x)

We move all terms to the left:

-36-(-9(6+2x))=0

We add all the numbers together, and all the variables

-(-9(2x+6))-36=0

We calculate terms in parentheses: -(-9(2x+6)), so:We get rid of parentheses

-9(2x+6)

We multiply parentheses

-18x-54

Back to the equation:

-(-18x-54)

18x+54-36=0

We add all the numbers together, and all the variables

18x+18=0

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

18x=-18

x=-18/18

x=-1

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