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-7(-2x-1)=7x+7
We move all terms to the left:
-7(-2x-1)-(7x+7)=0
We multiply parentheses
14x-(7x+7)+7=0
We get rid of parentheses
14x-7x-7+7=0
We add all the numbers together, and all the variables
7x=0
x=0/7
x=0
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