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14.2=x+3.9
We move all terms to the left:
14.2-(x+3.9)=0
We get rid of parentheses
-x-3.9+14.2=0
We add all the numbers together, and all the variables
-1x+10.3=0
We move all terms containing x to the left, all other terms to the right
-x=-10.3
x=-10.3/-1
x=10+0.3/1
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