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-20=2(-4+x)
We move all terms to the left:
-20-(2(-4+x))=0
We add all the numbers together, and all the variables
-(2(x-4))-20=0
We calculate terms in parentheses: -(2(x-4)), so:We get rid of parentheses
2(x-4)
We multiply parentheses
2x-8
Back to the equation:
-(2x-8)
-2x+8-20=0
We add all the numbers together, and all the variables
-2x-12=0
We move all terms containing x to the left, all other terms to the right
-2x=12
x=12/-2
x=-6
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