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-12x-55=11x-280
We move all terms to the left:
-12x-55-(11x-280)=0
We get rid of parentheses
-12x-11x+280-55=0
We add all the numbers together, and all the variables
-23x+225=0
We move all terms containing x to the left, all other terms to the right
-23x=-225
x=-225/-23
x=9+18/23
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