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186=-6(-6x-7)
We move all terms to the left:
186-(-6(-6x-7))=0
We calculate terms in parentheses: -(-6(-6x-7)), so:We get rid of parentheses
-6(-6x-7)
We multiply parentheses
36x+42
Back to the equation:
-(36x+42)
-36x-42+186=0
We add all the numbers together, and all the variables
-36x+144=0
We move all terms containing x to the left, all other terms to the right
-36x=-144
x=-144/-36
x=+4
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