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-0.4x-3.1=5.9
We move all terms to the left:
-0.4x-3.1-(5.9)=0
We add all the numbers together, and all the variables
-0.4x-9=0
We move all terms containing x to the left, all other terms to the right
-0.4x=9
x=9/-0.4
x=-22+0.2/0.4
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