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0.2x-0.4=2.8
We move all terms to the left:
0.2x-0.4-(2.8)=0
We add all the numbers together, and all the variables
0.2x-3.2=0
We move all terms containing x to the left, all other terms to the right
0.2x=3.2
x=3.2/0.2
x=16
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