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x-0.2x+5.2=20.8
We move all terms to the left:
x-0.2x+5.2-(20.8)=0
We add all the numbers together, and all the variables
0.8x-15.6=0
We move all terms containing x to the left, all other terms to the right
0.8x=15.6
x=15.6/0.8
x=19+0.4/0.8
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