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82=7x-3(4x-9)
We move all terms to the left:
82-(7x-3(4x-9))=0
We calculate terms in parentheses: -(7x-3(4x-9)), so:We get rid of parentheses
7x-3(4x-9)
We multiply parentheses
7x-12x+27
We add all the numbers together, and all the variables
-5x+27
Back to the equation:
-(-5x+27)
5x-27+82=0
We add all the numbers together, and all the variables
5x+55=0
We move all terms containing x to the left, all other terms to the right
5x=-55
x=-55/5
x=-11
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