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-4x-20=-2(-2x+10)
We move all terms to the left:
-4x-20-(-2(-2x+10))=0
We calculate terms in parentheses: -(-2(-2x+10)), so:We get rid of parentheses
-2(-2x+10)
We multiply parentheses
4x-20
Back to the equation:
-(4x-20)
-4x-4x+20-20=0
We add all the numbers together, and all the variables
-8x=0
x=0/-8
x=0
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