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-2x-42=5(4x-4)
We move all terms to the left:
-2x-42-(5(4x-4))=0
We calculate terms in parentheses: -(5(4x-4)), so:We get rid of parentheses
5(4x-4)
We multiply parentheses
20x-20
Back to the equation:
-(20x-20)
-2x-20x+20-42=0
We add all the numbers together, and all the variables
-22x-22=0
We move all terms containing x to the left, all other terms to the right
-22x=22
x=22/-22
x=-1
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