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2.8=0.8x
We move all terms to the left:
2.8-(0.8x)=0
We add all the numbers together, and all the variables
-(+0.8x)+2.8=0
We get rid of parentheses
-0.8x+2.8=0
We move all terms containing x to the left, all other terms to the right
-0.8x=-2.8
x=-2.8/-0.8
x=3+0.4/0.8
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