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-8x-9=-2x-27
We move all terms to the left:
-8x-9-(-2x-27)=0
We get rid of parentheses
-8x+2x+27-9=0
We add all the numbers together, and all the variables
-6x+18=0
We move all terms containing x to the left, all other terms to the right
-6x=-18
x=-18/-6
x=+3
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