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-0.4x=3.2
We move all terms to the left:
-0.4x-(3.2)=0
We add all the numbers together, and all the variables
-0.4x-3.2=0
We move all terms containing x to the left, all other terms to the right
-0.4x=3.2
x=3.2/-0.4
x=-8
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