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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
=0
x=0/1
x=0
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