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