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2x+2.1=18.3
We move all terms to the left:
2x+2.1-(18.3)=0
We add all the numbers together, and all the variables
2x-16.2=0
We move all terms containing x to the left, all other terms to the right
2x=16.2
x=16.2/2
x=8+0.2/2
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