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-6x+7x-9x=-8x
We move all terms to the left:
-6x+7x-9x-(-8x)=0
We add all the numbers together, and all the variables
-8x-(-8x)=0
We get rid of parentheses
-8x+8x=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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