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-3.8-3x=3.1
We move all terms to the left:
-3.8-3x-(3.1)=0
We add all the numbers together, and all the variables
-3x-6.9=0
We move all terms containing x to the left, all other terms to the right
-3x=6.9
x=6.9/-3
x=-2+0.9/3
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