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-x+2.8=0.3
We move all terms to the left:
-x+2.8-(0.3)=0
We add all the numbers together, and all the variables
-1x+2.5=0
We move all terms containing x to the left, all other terms to the right
-x=-2.5
x=-2.5/-1
x=2+0.5/1
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