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2.8+3.x+1=16.6
We move all terms to the left:
2.8+3.x+1-(16.6)=0
We add all the numbers together, and all the variables
3.x-12.8=0
We move all terms containing x to the left, all other terms to the right
3.x=12.8
x=12.8/3.
x=4+0.8/3.
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