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-6x-8.1=-5.7
We move all terms to the left:
-6x-8.1-(-5.7)=0
We add all the numbers together, and all the variables
-6x-2.4=0
We move all terms containing x to the left, all other terms to the right
-6x=2.4
x=2.4/-6
x=-1/2.5
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