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9x-x=9x+x
We move all terms to the left:
9x-x-(9x+x)=0
We add all the numbers together, and all the variables
9x-x-(+10x)=0
We add all the numbers together, and all the variables
8x-(+10x)=0
We get rid of parentheses
8x-10x=0
We add all the numbers together, and all the variables
-2x=0
x=0/-2
x=0
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