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5.5-0.8x=3.1
We move all terms to the left:
5.5-0.8x-(3.1)=0
We add all the numbers together, and all the variables
-0.8x+2.4=0
We move all terms containing x to the left, all other terms to the right
-0.8x=-2.4
x=-2.4/-0.8
x=2+0.8/0.8
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