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-x-9=x-23
We move all terms to the left:
-x-9-(x-23)=0
We add all the numbers together, and all the variables
-1x-(x-23)-9=0
We get rid of parentheses
-1x-x+23-9=0
We add all the numbers together, and all the variables
-2x+14=0
We move all terms containing x to the left, all other terms to the right
-2x=-14
x=-14/-2
x=+7
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