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-2x-7=-7-4x
We move all terms to the left:
-2x-7-(-7-4x)=0
We add all the numbers together, and all the variables
-2x-(-4x-7)-7=0
We get rid of parentheses
-2x+4x+7-7=0
We add all the numbers together, and all the variables
2x=0
x=0/2
x=0
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