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-x+2.5=3.8
We move all terms to the left:
-x+2.5-(3.8)=0
We add all the numbers together, and all the variables
-1x-1.3=0
We move all terms containing x to the left, all other terms to the right
-x=1.3
x=1.3/-1
x=-1+0.3/1
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