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-3x+65=9x+257
We move all terms to the left:
-3x+65-(9x+257)=0
We get rid of parentheses
-3x-9x-257+65=0
We add all the numbers together, and all the variables
-12x-192=0
We move all terms containing x to the left, all other terms to the right
-12x=192
x=192/-12
x=-16
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