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-7x-4=-2x-5x-4
We move all terms to the left:
-7x-4-(-2x-5x-4)=0
We add all the numbers together, and all the variables
-7x-(-7x-4)-4=0
We get rid of parentheses
-7x+7x+4-4=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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