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2x+4=-2(2x+4)
We move all terms to the left:
2x+4-(-2(2x+4))=0
We calculate terms in parentheses: -(-2(2x+4)), so:We get rid of parentheses
-2(2x+4)
We multiply parentheses
-4x-8
Back to the equation:
-(-4x-8)
2x+4x+8+4=0
We add all the numbers together, and all the variables
6x+12=0
We move all terms containing x to the left, all other terms to the right
6x=-12
x=-12/6
x=-2
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