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-3.3+2x=3.1
We move all terms to the left:
-3.3+2x-(3.1)=0
We add all the numbers together, and all the variables
2x-6.4=0
We move all terms containing x to the left, all other terms to the right
2x=6.4
x=6.4/2
x=3+0.4/2
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