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-12x-9-9-13-2x=154
We move all terms to the left:
-12x-9-9-13-2x-(154)=0
We add all the numbers together, and all the variables
-14x-185=0
We move all terms containing x to the left, all other terms to the right
-14x=185
x=185/-14
x=-13+3/14
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